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This character sheet is for the people who live in the town of Eureka.

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The Townsfolk of Eureka

    Sheriff Jack Carter 

Jack Carter

Played by: Colin Ferguson

https://static.tvtropes.org/pmwiki/pub/images/sheriff_jack_carter.jpg

Jack Carter is a U.S. Marshal who reluctantly ends up as Sheriff of Eureka. Jack is consistently dumbfounded by the wonders Eureka produces, as well as its propensity to produce things that often threaten the entire town, if not the world. Despite being a man of average intelligence in a town full of geniuses, Jack's admittedly simplistic ideas and ability to make intuitive connections between seemingly disparate events often save the day. (This is in contrast to the other residents of Eureka, who, being stereotypical scientists, tend to over-complicate things and get lost in meantime).


  • Babies Ever After: The series ends with Allison telling Jack she's pregnant.
  • Belligerent Sexual Tension: With Allison for a few seasons. With Tess from the moment she shows up. With Nathan, in most scenes they share.
  • Berserk Button: Threatening to harm Zoe or Allison, or anybody else he's close to will usually elicit this response.
  • Big Brother Instinct: Towards Fargo, believe it or not. When things get their worst for the him, Jack is always there to help the little guy.
  • Big Damn Heroes: He does it a lot, being a former U.S. Marshal helps.
  • Book Dumb: His street smarts usually save the day after scientists messed up.
  • The Call Knows Where You Live: After his accidental adventure in Eureka in the pilot, he went back to his job as a US Marshal, only to be offered the "promotion" to Sheriff of Eureka.
  • Calling Me a Logarithm: With his barely-above-average intelligence and layman's grasp of physics, Jack frequently feels insulted when his genius friends throw around terms like "p-brane" and "smart asphalt".
  • Chronic Hero Syndrome: Summed up perfectly in the finale, where he jumps through a wormhole in order to close it;
    Carter: This is what I do!
  • The Chew Toy: Put through the wringer on a daily basis trying to clean up or fix the incredibly ludicrous ways Eureka's experiments go wrong.
  • Cutting the Knot: Has a talent for finding the simplest way out of a problem, which the people of Eureka learn to value. Often subverted, Carter's first suggestion is often along the lines of turn it off or cut the power, and it has to be explained why that won't work, necessitating finding the right tool (or just a bigger tool) with which to cut the proverbial knot. Sometimes outright averted: there is no simple solution, and Carter's plan is just as complex and convoluted as the chain of events with led to the problem in the first palce.
    Carter: Have you tried just shutting it off?
    Stark: (completely deadpan) Turn it off. Why didn't I think of that? Fargo, turn the machine off.
    (awkward pause)
    Carter: (realizing he's being insulted) Oh, and that's a stupid question?
  • Determinator: Carter powers through injuries that would lay anyone else up for weeks, plows into the nexus of the latest scientific weirdness to shut it down, and when he's on a case, no amount of threats, bullying, bureaucratic red tape, or snark about his intelligence will stop him from solving it.
  • Heroic BSoD: When Grant started to mess up the timeline "again" Allison got Killed Off for Real, until Jack and Grant fixed it.
  • Heterosexual Life-Partners: With Henry. When Henry announced he was going to leave Eureka in season 1, Jack thought about doing the same, not wanting to live in Eureka without him, and he seemed to be the only one to visit him in prison.
  • Hidden Depths: He might appear average and is looked down upon by many scientists, but he has a very keen intuition which helps him identify the problem at hand and resolve the situation.
  • Impossibly High IQ: Averted. Jack's IQ is 111, which is on the high side of average, and perfectly consistent with his portrayal as Book Dumb but fairly clever. However, fans have speculated he's smarter than that, because he was a lazy student and didn't really take the test seriously.
  • Leeroy Jenkins: What most if not all the townsfolk thought of him when he first took the job.
  • Like Brother and Sister: Zigzagged. Though his relationship with Jo is very siblinglike - they get on each others nerves, love to watch the other suffer, but would drop everything to help the other - the algorithm of the matrix the Astreus Crew was trapped in calculated it would be highly likely for them to become romantically involved with their respective partners gone. This forced them to confront their relationship and admit that they have considered each other as romantic prospects, though they are Better as Friends.
  • Made of Iron: Nothing, and I mean nothing is enough to keep him down for long.
  • Mr. Fanservice: Crosses over with Naked People Are Funny. Carter repeatedly ends up naked/shirtless, which is usually very embarrassing for him.
  • Nice Guy: He's generally heroic, selfless and tries to help out the rather difficult townspeople.
  • Only Sane Man: In a company town full of Mad Scientists, it's the U.S. Marshal sheriff who has any common sense.
  • Papa Wolf: Do not mess with Jack's daughter; he takes it very personally.
  • Plot Armor: Lampshaded by Andy, who notes that the odds of survival are better when Jack's around.
  • Red Oni, Blue Oni: Jack is red, usually against Allison or Henry's blue. Jo's usually the red to his blue, though.
  • Seen It All: In the pilot, he spots himself and Zoe driving in the opposite direction and is so startled it contributes to the subsequent car crash that lands him in Eureka. In the last episode they see it again from the other side and he just shrugs it off.
    Carter: We'll deal with it in the morning.
  • Smarter Than You Look: Jack is not stupid. He's actually got a way of thinking that allows him to instantly identify the problem at hand. More often that not the scientific genii dismiss his initial idea, only to later to realise that it was the correct solution all along.
  • Summon Everyman Hero: "Hello, I'm sheriff Carter. I'm gonna save the day with my everyman logic!"
  • Unlucky Everydude: In a town full of geniuses, he often thinks of himself as this. Stark never really helped in that regard.
    Stark: Yes he said invisibling.
  • Unresolved Sexual Tension: Has loads of this with Allison for most of the series, until it eventually gets resolved.
  • Will They or Won't They?: With Allison. They do.

    Zoe Carter 

Zoe Carter

Played by:Jordan Hinson

https://static.tvtropes.org/pmwiki/pub/images/zoe_carter.jpg

Jack's rebellious teenage daughter. Unlike her father, she is intelligent enough to keep up with the town's residents (her IQ is 157), yet like her father, possesses the street smarts most of the town's residents do not. She longs to be a medical doctor, and with the help of Henry's recommendation letter, receives an early acceptance to Harvard's medical program. She dates Lucas but in the altered timeline, they broke up when Lucas moved to Geneva, and she is now showing interest in Zane. She is also a bit more mature and responsible after her time at Harvard.


  • Bratty Teenage Daughter: Eventually grows out of it and becomes closer to her father.
  • Commuting on a Bus: Beginning with Season 4, thanks to early admittance to Harvard on a medical scholarship.
  • Daddy's Girl: Despite the fact they often snark at each other, Zoe is very close to her dad. Lampshaded by Beverly who tells her she has daddy issues.
  • Deadpan Snarker: She can keep up with her dad in snark-offs, and almost always has a witty retort to anyone who comes at her verbally.
  • Military Brat: Marshall Brat, actually. Her dad being a US Marshall and often away working cases caused strife at home, but Zoe's picked up several skills from, as she puts it, having a "cop dad."
  • Never My Fault: Said that a lot in the first few seasons, usually after she messed up badly.
  • Non-Action Guy: Most of the time. As the series continued, she slips into Action Girl more - probably gets it from her father's side of the family.
  • Non-Action Snarker: Man does she love to snark.
  • Perky Goth: Had this style for the first two seasons.
  • Reformed Criminal: She started out as Delinquent, involved in things like theft and credit card fraud, but she reformed and has left her criminal ways behind her by the time of season 2.
  • Single Woman Seeks Good Man: And always ends up with a teenaged crazy, go figure.
  • Smarter Than You Look: Ridiculously so. She's able to hold her own academically in Eureka and hide her smarts from her dad.

    Dr. Henry Deacon 

Henry Deacon

Played by: Joe Morton

https://static.tvtropes.org/pmwiki/pub/images/henry_deacon.jpg

Henry is the town's jack-of-all-trades. Although, like most residents of Eureka, he is a brilliant multidisciplined scientist, Henry has ethical objections to the kind of research conducted at Global Dynamics, preferring employment as the town's mechanic. Henry's assistance is often invaluable in defusing the situations the experiments in town create. During Season 3, he was elected mayor as a write-in candidate. Following the change in timeline in season 4, he is suddenly married and is trying to keep the timeline shift a secret. Late into the 4th season, he confides in his "wife" after he realizes he is beginning to fall in love with her.


  • Absent-Minded Professor: Toned down, but the pilot definitely portrays him as such, getting wrapped up enough in his work he forgets little things, like not letting the outside world know Eureka is more than it appears. Throughout the series, he's still very jovial with a tendency to throw himself wholeheartedly into whatever he's working on at the moment.
  • Almighty Janitor: Henry runs the mechanic shop where most car repairs happen (offscreen), and as such is typically seen in grease-stained overalls. He's also the coroner, road repair man, telephone repair man, the entirety of the fire department, general maintainence mechanic and engineer, and nearly any other odd job that needs doing in a given episode. He's also one of, if not the, smartest person in all of Eureka, conversant with many different scientific fields and often works closely with Jack on whatever catastrophe is barreling towards Eureka this week.
  • Anti-Hero: For almost all of season 2, as went to great lengths to pursue his own agenda regarding the Artifact, which was responsible for Kim's death.
  • Bunny-Ears Lawyer: Henry's just too knowledgeable about too much stuff, and too critical to keeping Eureka running on a day-to-day basis (never mind assisting Jack with the crisis-of-the-week) for him to ever be kicked out, and the times he considers leaving Eureka are very tense. When not keeping the high-tech infrastructure of the town running or handling the science side of an investigation with Jack, he's usually puttering on his own experiments in his garage. Henry is most typically seen in grease-stained brown overalls with a velcro patch where he can slap on a badge for whatever job he's doing at the moment.
  • The Conscience: Always used to say that science should only be used for furthering mankind's understanding of the universe. Even after his Kim-related season 2 breakdown, he still champions responsible use of science.
  • Despair Event Horizon: Kim's death caused him to have a Heroic BSoD. He illegally travelled back in time to prevent her death, creating a Time Paradox.
  • Fallen Hero: In Season 2, as he grieves for Kim and hatches something uncomfortably close to an evil scheme revolving around the Artifact.
  • Happily Married: To Grace. After falling in love with her and telling her about the Alternate Timeline, they developed a happy relationship, and even renewed their vows.
  • Mr. Exposition: He's the guy Jack usually goes to for technobabble of the week, since he's also fluent in non-technobabble.
  • Non-Action Guy: Though he graduates to a full-on action-guy quite a bit early on.
  • Odd Friendship: Jack is closer to Henry then pretty much anyone else in Eureka, and the feeling is mutual. Jack is of strictly average intelligence and has no scientific education or urge to develop such, Henry is the smartest person in a town full of smart people and conversant with a wide array of scientific disciplines. They bond over Henry preferring to keep up a blue-collar lifestyle as the town's mechanic (among many other things). It's also likely Henry's past as a teacher means he's uniquely suited to explain the current situation to Jack, then watch as Jack's own unique mind takes that information and arrives at an unexpected solution.
  • Omnidisciplinary Scientist: Whenever Jack has a question about science, Henry will be able to give him an answer. Justfied both in that Henry is one of the older members of the cast and so has had time become conversant with multiple fields of study, as well as his oft-alluded to past as a teacher, where he would be gaining and passing on knowledge to his students (among them Nathan Stark). Henry's also frequently implied to be the smartest person in a town full of people reknowned for being smart.
  • The Pirates Who Don't Do Anything: During season 1 he's a mechanic, but rarely actually works on cars unless things are slow. After he's elected mayor of Eureka, while there are a couple of instances where his status as mayor is relevant to the plot (e.g. preventing the DoD from firing Jack) most of the time viewers could be forgiven for forgetting he even had the job.
  • Science Hero: Often saves the day with science. He's also concerned with using science in the right way, which puts him in conflict with Mad Scientists with For Science! approaches.
  • The Smart Guy: Often implied to be the smartest person in a town designed for smart people, and typically works closely with Jack to unravel the latest scientific mystery.
  • Technobabble: Zig-zags this, which is one of the reasons for him being so crucial to Jack's efforts. He can talk jargon with any big brain in Eureka, explaining to them how they screwed up, then literally turn around and give Jack an explanation he can parse to comprehend the problem.

    Allison Blake 

Allison Blake

Played by: Salli Richardson-Whitfield

https://static.tvtropes.org/pmwiki/pub/images/allison_blake.jpg

Allison is a Department of Defense agent who acts as the liaison between Eureka and the Federal Government, and later becomes the director of Global Dynamics. She is always at the forefront of any dilemma that might arise. Although she works for the DoD, she has two PhDs and an MD. Allison is also raising her son Kevin, an autistic youth whose father died when he was still a baby, and Jenna, the daughter she conceived with Nathan shortly before his death/disappearance. After the change in the timeline, Kevin is no longer autistic and she never became director of GD; she is, instead, head of GD's medical science division.


  • Babies Ever After: The series ends with Allison telling Jack she's pregnant.
  • Belligerent Sexual Tension: With Jack. It's even a plot point that's pointed out by EVERYONE.
  • Cartwright Curse: In-universe, she fears she has this. Kevin's father died before he was born, her ex-husband Nathan Stark died literally the day they were going to get re-married, and she later falls for Jack Carter, who's job is to put his life on the line once a week to keep Eureka from becoming a mile-deep crater.
  • Ms. Fanservice: Definitely has her moments, such as stripping down to some very provocative underwear to try and seduce Jack in "Purple Haze," and a few naked shower and/or decontamination scenes.
  • Nice Girl: Kind-hearted and fairly patient, despite the other scientist's quirks.
  • Not So Above It All: She really seems to enjoy participating in Baseball games when she gets the chance.
  • The Reliable One: Unlike most of the scientists in Eureka, she usually focuses on the problems and tries to keep things sane, rather than getting caught up in her own projects.
  • Science Hero: Like most of the town, though particularly pronounced as director of G.D
  • Tsundere: Type B. She is unflappably courteous and kind to everyone she meets... except Nathan.
  • Unresolved Sexual Tension: She and Jack dance around some budding feelings for each other for quite some time. They end up resolving it late in the series.
  • Will They or Won't They?: With Jack. They do.
  • Workaholic: As Zoe comments, she's the kind of Type A bride to work on her wedding day.

    Josefina "Jo" Lupo 

Jo Lupo

Played by: Erica Cerra

https://static.tvtropes.org/pmwiki/pub/images/jo_lupo.jpg

A tough, no-nonsense cop with a love of firearms. After a brief fling with Taggart, she later develops a relationship with Zane. Zane proposes to her in the Season 4 premiere, but before she can answer him, time is altered to where the two of them never dated, and in fact cannot stand each other. In the new timeline, she is Head of Security at Global Dynamics, her role as deputy taken by the android Deputy Andy.


  • Age-Gap Romance: With Taggert.
  • Belligerent Sexual Tension: With Carter, Taggart, Zane, and even Fargo.
  • Berserk Button: Just about anything can get Jo mad, and don't you dare call her by her full name...
  • Beta Couple: to Jack and Allison, with Zane.
  • Brainy Brunette: She's not a super-genius scientist, but she's still highly intelligent.
  • Cool Big Sis: Has this dynamic with Zoe. In "All That Glitters" she tells Jack she grew up with three brothers and always wanted a sister when she offers to chaperone a party Zoe wants to have while Jack is out of town.
  • Crack Pairing: With Taggart. At least, that's how it's treated initially. Later it's treated as just another romance in a wacky town.
  • Determinator: Jo can power through damn near anything to see her mission completed.
  • Geeky Turn-On: When everyone starts sharing dreams in season 2, it turns out the Zorro dream was actually hers, leaving Jo naturally horrified that on some level, she's actually secretly attracted to Fargo!
  • Gun Nut: She loves guns. In the pilot it is shown that reassembling guns is a hobby of hers, and she is very passionate about guns, very happy whenever she gets to use one.
  • Hidden Depths: She's a Lady of War, but she still likes girly things like dancing and Cosmo, though she hides both.
  • I Have Brothers: Growing up with brothers she wanted to keep up with, she developed a lot of traditionally male skills.
  • Leaving You to Find Myself: She pulls one of these on Zane, after falling back into a relationship with him after the timeline shift. She goes on a spirit walk instead of joining him on the mission to Titan.
  • Lady of War: And a very scary lady of war she is at that. She's a badass fighter, with great skills in hand-to-hand combat as well as weapons, always looking put-together and graceful when she's kicking ass.
  • Like Brother and Sister: Zigzagged. Tough her relationship with Jack is very siblinglike - they get on each others nerves, love to watch the other suffer, but would drop everything to help the other - the algorithm of the matrix the Astreus Crew was trapped in calculated it would be highly likely for them to become romantically involved with their respective partners gone. This forced them to confront their relationship and admit that they have considered each other as romantic prospects, though they are Better as Friends.
  • Love at First Sight: Well, at least infatuation at first sight with Taggart.
  • A Mother to Her Men: It's not brought up often, but as head of GD security she has moments when she shows how much she cares about the men under her command. When some of them were critically injured during an episode she watched over them in the infirmary, stating "I've got four guys who can't be moved, so I can't be moved."
  • No Guy Wants an Amazon: It's not easy for a badass lady like her to find a boyfriend, especially in a town full of professional nerds. They're intimidated by her Action Girl nature, she's intimidated by their off-the-charts intelligence.
  • That Came Out Wrong: Jo has a bad case of "foot in mouth disease."
    • In the Pilot:
      Sheriff Cobb: (hangs up the phone) That was Ned Carver. He claims aliens abducted some of his cattle again, so...
      Jo: Tell him to call me when they move on to anal probes.
      [Cobb and Zoe stare]
      Jo: Wait, um... that didn't come out right.
    • In "A Night At Global Dynamics:
      Zane: We'll use SARAH to slip into the back-door of GD.
      Fargo: Uh, we?
      Zane: Once a back-door link is established, there's nothing I won't have access to.
      Fargo: Uh, I think you mean there will be nothing that I have access to.
      Jo: Boys, there is plenty of back-door access for everyone!
      (awkward pause)
      Jo: That didn't come out right.
  • Tragic Keepsake: After the timeline changes, Jo keeps the engagement ring that the original Zane proposed to her with, as a reminder of their relationship, seeing as in this reality, they never dated and don't even like each other.
  • Tsundere: Towards Zane, and most characters for that matter. She's mostly a badass Tsuntsun, but once she gets close to someone she softens up slightly. If those people are hurt in anyway though, her Dere side comes out and she is very soft-spoken and caring.
  • When She Smiles: It makes you want to smile with her.
  • Will They or Won't They?: With Zane after their relationship is erased. It clear she still loves him, and he is attracted to her, but she is unwilling to rekindle their romance, and he doesn't even know there is was any relationship to rekindle in the first place.
  • Working with the Ex: Has to work very closely with Zane after their relationship is erased from reality. Of course, she is the only one of them who remembers this relationship.
  • Wrench Wench: Not a mechanic but, she knows how to assemble and disassemble her weapons in a snap.

    Dr. Douglas Fargo 

Douglas Fargo

Played by: Neil Grayston

https://static.tvtropes.org/pmwiki/pub/images/douglas_fargo.jpg

A junior scientist who's always been treated dismissively by his peers. Accident-prone, he more often than not ends up a victim of the disasters befalling the town. He has also caused a fair share of the problems. Neil Grayston also provides the voice of S.A.R.A.H. (Self Actuated Residential Automated Habitat), the bunker home Jack and Zoe live in. In the alternate timeline, he is head of GD, and not well-liked by the staff because of his alternate's imposing and intimidating manner. He has difficulty in this new role as his alternate was a domineering egomaniac, an act he has trouble pulling off. Even so, the job has begun to transform him into a more decisive and capable leader as the weight of responsibility has forced him to stand up to other GD employees, the Department of Defense, and military generals.


  • Amazon Chaser: Had a crush on Jo for quite a while.
  • Badass Bookworm: What he becomes when he really puts his mind to it.
  • Bumbling Sidekick: To Stark originally, though he gets a little better.
  • Butt-Monkey: His face should be on the tropes page. In particular in the first three seasons he inadvertently caused every other accident, and managed to get himself in a number of embarrassing situations.
  • Celebrity Crush: His crush on Sarah Michelle Gellar (in particular in her role as Buffy) comes up frequently, for instance when he names Carter's smart house S.A.R.A.H or uses "Douglas the vampire slayer" as a passphrase.
  • Character Development: He goes from the lovable Bumbling Sidekick /Butt-Monkey in early seasons to an actually fairly competent head of GD in the last two seasons.
  • Clueless Chick-Magnet: He's actually had many a pretty little lady after him.
  • Crouching Moron, Hidden Badass: In the second half of the fourth season, Fargo starts to step up to his role as head of Global Dynamics and even manages to improvise his way out of an inadvertent death trap when he and Zane end up in a launched rocket with no controls or communications.
  • Hidden Depths: He doesn't always do the sensible thing, he always wants to do the right thing.
    Stark: I knew you had it in you, Fargo.
    Fargo: I didn't.
  • Plucky Comic Relief: Always pressing the wrong button and getting into embarrassing situations, he's a major source of comic relief.
  • The Smart Guy: For all that thing tend to go wrong when he's involved, he's actually very smart. This is played up more after Stark's disappearance and especially in season 4 onwards.
  • Sharp-Dressed Man: He wears a suit like Stark's in the new timeline.
  • Undying Loyalty: To Stark. This is one of the things about him, which is strange considering the fact that Stark's always been a jerk towards him.

    Dr. Nathan Stark 

Nathan Stark

Played by: Ed Quinn

https://static.tvtropes.org/pmwiki/pub/images/nathan_stark.jpg

One of Eureka's top scientists. He and Jack are frequently at odds, though both respect each other. He is formerly married to Allison, and they rekindled their relationship in the second season. They were supposed to get remarried in the third season, but he dematerializes while saving the world from a time paradox on the day of their wedding, an event that apparently still occurred in Season 4's alternate timeline.


  • Big Brother Worship: From Fargo, who admires him and looks up to him, regardless of how dismissive Stark is of him.
  • For Science!: That's his justification for some of the things he does and what he allows some of the other scientists to get away with.
  • Gone Horribly Right: His research into the Artifact.
  • Heroic Sacrifice: Saved the universe knowing full well it would cost him his life. It happened on the day of his wedding. In fact, it was at the moment he should have been saying his vows.
  • Insufferable Genius: In a town full of geniuses, he is still near the top of the heap and he is fully aware of this.
    Carter: "Does your ego fit in this building?!
    Stark: [nonchalantly checks the ceiling's height]
  • Killed Off for Real: Or, displaced in time for real. Don't really know for sure.
  • Mad Scientist: And unlike just about all the other scientists in Eureka, not in a very nice way.
  • Married to the Job: Cited as a major factor for his divorce to Allison.
  • Meaningful Name: He's named after Tony Stark of all people.
  • Morally Ambiguous Doctorate: Though not really evil, just morally ambiguous... really really ambiguous.

    Zane Donovan 

Zane Donovan

Played by: Niall Matter

https://static.tvtropes.org/pmwiki/pub/images/zane_donovan.jpg

A rebellious genius, recruited in the second season as an alternative to imprisonment after being arrested for fraud (allegedly causing the New York Stock Exchange to crash). He also develops a relationship with Jo Lupo shortly after his arrival in Eureka. However, this relationship is erased with the change in timeline. He is back to being a perpetual prankster and a low-level nemesis of Jo, though he shows signs of improving because of the trust she puts in him.


  • The Atoner: He's started to think of his new job in Eureka as a chance for this.
  • Beta Couple: His relationship with Jo is this to Allison and Jack
  • Dark and Troubled Past: Former felon, that kinda says it all. Though it's a Downplayed variant.
  • Heroic Comedic Sociopath: Though not evil at all, just an ass.
  • Heel–Face Turn: Started out as a Jerkass drag-along in Eureka but eventually grows into someone who genuinely wants to be there. Time Travel-related shenanigans has the effect of undoing all of it, at first.
  • Hidden Depths: He actually can be sensitive once in a while.
  • Manipulative Bastard: In his debut episode especially, he brilliantly plays people's egos and personal weaknesses to get him information and access to the tech in the sheriffs' station.
  • Reformed Criminal: He started out as a criminal, but was recruited to work for GD due to his genius. Eventually, he is officially pardoned.
  • Technical Pacifist: He is a jerk yes, but he doesn't like to actually hurt anybody.
  • Will They or Won't They?: With Jo in seasons 4 and 5. He's clearly attracted to her but she has already been in a relationship with him in the original timeline, and doesn't want to get hurt again. He doesn't know any of this or course.

    Dr. Jim Taggart 

Jim Taggart

Played by: Matt Frewer

https://static.tvtropes.org/pmwiki/pub/images/jim_taggart.jpg

Taggart is a somewhat eccentric animal expert. He also does work in geophysics.


  • Age-Gap Romance: With Jo.
  • Amazon Chaser: Has a relationship with Jo, and, even after it ends, continues to hold a torch for her for a while.
  • Awesome Aussie: He may be a bag of cultural clichés (with his love of animal tracking as a possible reference to Steve Irwin), but he's not scared of a little (town-threatening) danger.
  • BFG: All non-lethal of course, but still... he has quite a few.
  • The Big Guy: Easily one of the tallest members of the main cast, and robust enough to arm himself with multiple super-weapons for animal tracking.
  • CloudCuckoolander: Even the other townsfolk of Eureka think he's weird, what's that tell you?
  • The Cuckoolander Was Right: Most of the time his theories are too bizarre to be true, other times...
  • Genius Bruiser: While not refined, he is just as well educated as anybody else in Eureka, which means he's a genius of course. He's also an impressive judge of character, and a cunning tracker.
  • Insistent Terminology: Taggart is not the town's dogcatcher. He is a Biological Containment Specialist.

    Dr. Holly Martin 

Holly Martin

Played by: Felicia Day

https://static.tvtropes.org/pmwiki/pub/images/dr_holly_martin_6.jpg

Holly is a Rocket Scientist and Fargo's Love Interest in Seasons 4 and 5.


  • Innocent Innuendo: A lot of her dialogue ends up as accidental innuendo.
    Holly: [talking about slipping through a partially stuck door] I can manage eight inches, no problem!

    Holly: [shortly after] I have extremely limber joints!

    Holly: [when she gets stuck halfway through the door] Is it too late to coat me in something slippery?

    Holly: [explaining why she wants a body instead of living as a Virtual Ghost] Can you imagine going through eternity unable to touch yourself?
  • Meta Girl: After she comes Back from the Dead but had her memory wiped, she goes around town observing everyone to try and get it back. A number of things she says, whether about Carter, Fargo, or the town itself, dovetail rather neatly with the fans' opinions of the show and its characters.
  • Really Gets Around: She prefers to deal with unresolved sexual tension by resolving it, and being more comfortable with the sexual part of relationships than the romantic ones. "This One Time At Space Camp" reveals that one of her previous conquests was Fargo's nemesis at Galaxy Camp.
  • Sacrificial Lion: As part of the fifth season's Darker and Edgier turn, Holly ends up being murdered by Senator Wen to keep the true nature of the virtual world a secret.
  • Sex Goddess: Claims that while she's awkward with the more social aspects of relationships, she's really good at sex.
  • She Knows Too Much: When she figures out the crew of the Astraeus are trapped in a Lotus-Eater Machine, she is immediately killed by Senator Wen.
  • Virtual Ghost: After her murder, it's revealed that Holly was still "alive" in some fashion inside the Matrix. Fargo eventually managed to upload her into SARAH's computer systems, where Holly lives on as a projection on SARAH's wall until she's fully revived.

    Trevor Grant 

Trevor Grant

Played by: James Callis

https://static.tvtropes.org/pmwiki/pub/images/trevor_grant.jpg

An associate of Albert Einstein and one of the founding members of Eureka. In the original timeline, the Einstein-Rosen Bridge is called the Einstein-Grant Bridge after him. He time-travels to the present with the main characters, resulting in the new timeline. He returns in the series finale to buy GD after it loses government funding, saving Eureka.


    SARAH 

SARAH

Played by: Neil Grayston

SARAH (Self Actuated Residential Automated Habitat) may not be a human, but the Smart House is a character in her own right, becoming quickly attached to Carter and having a few emotional issues of her own.
  • Benevolent A.I.: Well, mostly. Sometimes crosses over to The Computer Is Your Friend. She has good intentions, but sometimes she does messed up things, like trapping Carter along with several other townspeople in "H.O.U.S.E. Rules," when Carter said he might leave, or manipulating a scientist into creating gravity disturbances and attacking Sheriff Andy after Carter was fired and set to leave Eureka. Largely Justified as she has abandonment issues stemming from the fact that BRAD (The AI SARAH was built on top of) and the A.I.s before her were all scrapped/shelved.
  • Cargo Ship: Invoked by herself. She goes as far as installing artificial emotions in Deputy Andy to make it happen.
  • Love Hungry: A Downplayed variant. SARAH doesn’t force Andy to love her, but gives him the ability to feel (romantic) love, because she has fallen for him. It works. Andy is flattered at her interest, and they begin to see each other.
  • Robo Romance: With Andy. Andy decides he wants to keep the emotional subroutine, flattered she went on such lengths for him, and they start a relationship. Cue the next morning, Andy is seen coming out of SARAH's attachment patch and adjusting himself by a very astonished and disturbed Jo and Carter.
  • Runaway Bride: Was engaged to marry Andy, but she got cold feet on the day of the wedding. Though she is not ready to be a housewife, as she calls it, she resumes the relationship with Andy, and they are, as of the finale, still together.
  • Smart House: Designed to anticipate her owner's needs and desires. Though her attachment to Carter leads her to do some bad things, and she can be neurotic at times.
  • Tsundere: Has some Tsundere tendencies towards Carter. If she is mad at him and feels neglected, she refuses to let him in, but she is also very protective of him and will go to great lengths so he doesn't leave. Also to Andy, going from trying to kill him to installing artificial emotions without his volition because she is in love with him.

    Deputy ANDY 

ANDY

Played by: Ty Olsson, Kavan Smith

https://static.tvtropes.org/pmwiki/pub/images/andy_80.jpg

ANDY is a robotic law enforcement unit created by GD, becoming Jack's deputy after Jo is promoted to head of GD security.

He was General Mansfield's hand-picked replacement for Jack as sheriff after Jack got fired, but ANDY comes to the conclusion that Jack should remain as the sheriff.


  • Androids and Detectives: Has this dynamic with Jack after he becomes his deputy.
  • Ascended Extra: He was meant to be a one-off character in season 3, but became a recurring one in season 4.
  • Benevolent A.I.: Very much so. He's always happy to help.
  • Cannot Tell a Lie: He is incapable of lying when asked a direct question.
  • Major Injury Underreaction: Played for Laughs. As a robot, he reacts to the various accidents that befall him with what can be summed up as a "Isn't that something?" attitude.
    ANDY: My software indicates I should acknowledge my physical injuries, OWWWWWWWWWWW.
  • Meaningful Name: "Andy" is short for "Android".
  • The Nth Doctor: He's played by Ty Olsson in his first appearances. In "The Story of O2", he's replaced by Kavan Smith, and has been redesigned In-Universe to look different as ANDY 2.0.
  • O.O.C. Is Serious Business: If Andy is not cheerful, you know something is seriously wrong.
  • Ridiculously Human Robots: He's a robot that looks virtually identical to a human.
  • Robo Romance: With SARAH. After falling in love with him, she installs an emotional subroutine in Andy, allowing him to feel emotions. Andy is flattered at her interest and they begin a relationship. Though they had some difficult times, such as when SARAH cancelled the wedding or when he was trapped on Titan, they remain a happy couple.
  • Sherlock Scan: He figures out the entire Carter-travelled-to-1947-and-returned-to-an-Alternate-Universe plot after looking at him and fielding a handful of totally innocuous questions.

    Grace Monroe 

Grace Monroe

Played by: Tembi Locke

https://static.tvtropes.org/pmwiki/pub/images/grace_monroe.jpg

Henry Deacon's wife in the new timeline. She is later revealed to have been a Consortium spy recruited by the new timeline's Henry. However, she'd stopped long before she was arrested.


  • Happily Married: Once Henry tells her about the time travel and they manage to form a relationship again, they are happy together.
  • Heel–Face Turn: Offscreen, she and other timeline Henry abandoned the Consortium together.

    Vincent 

Vincent

Played by: Chris Gauthier

https://static.tvtropes.org/pmwiki/pub/images/vincent_eureka_17.jpg

The owner of Cafe Diem, a local restaurant. Vincent's restaurant has no menus as he is able to make anything that a customer orders. He is another one of Eureka's resident geniuses, having a doctorate in molecular gastronomy.


  • Ambiguously Gay: The show did not confirm, explore, or dramatize his sexuality in any way, but his manners and some of his comments suggest he is.
    • In the season 1 episode "Invincible", when Carl Carlson planted a public kiss on Beverly, some other men commented how they'd always wanted to do so. Vincent's response was to say, "Even I've thought about it", which would seem to imply there was something unusual about him in particular wanting to do so.
    • In the season 2 episode "Games People Play", when the problem of the week causes Jack to imagine a fake Eureka where people begin to disappear, He asks Vincent if he has seen his deputy 'Joe Lupo' and Vincent replies 'No, is he cute?' implying an interest in men.
    • In the series finale it doesn't seem so ambiguous any more, to judge from his reaction to naked Parrish.
    Vincent: Man-tastic!
  • Bigger on the Inside: Vincent's pantry, which is what allows him to cook so many different dishes.
  • No Name Given: His last name is never revealed.
  • Supreme Chef: As mentioned, Cafe Diem doesn't have a menu, because Vincent can make anything the customer asks for.

    Isaac Parrish 

Isaac Parrish

Played by: Wil Wheaton

https://static.tvtropes.org/pmwiki/pub/images/isaac_parrish.jpg

Head of Eureka's Non-Lethal Weapons department.


  • Expy: He's very similar to the Larry Haberman of the original timeline.
  • Inferiority Superiority Complex: Looks down on Fargo for being a "legacy", while at the same time having an almost pathological need to one up him at every turn.
  • Insufferable Genius: He is convinced he is a brilliant genius and uses every opportunity to sing his own praises.
  • The Rival: To Fargo, ever since childhood. He is the most critical of Fargo's time as the head of GD. He is also his chief rival for Holly's affection.

    Larry Haberman 

Larry Haberman

Played by: Christopher Jacot

https://static.tvtropes.org/pmwiki/pub/images/larry_haberman1.jpg

A GD employee.


  • Butt-Monkey: Perhaps the only character to be more of one than Fargo. (Not terribly surprising, since Larry is essentially Fargo minus the sympathetic qualities.)

    Kevin Blake 

Kevin Blake

Played by: Meshach Peters (Season 1 to 3), Trevor Jackson (Season 4 and 5)

https://static.tvtropes.org/pmwiki/pub/images/kevin_blake.jpg

Alison Blake's teen son. Autistic in the original timeline, not so in the new one (with the same genius intellect as before).


  • Alternate Timeline: His previous version is responsible for creating one; unlike most versions of the trope, this timeline actually remains.
  • Kid Hero: Not enough to legally drive, has helped save the town a few times.
  • Neurodiversity Is Supernatural: When first introduced, he was depicted as autistic, which was eventually theorized as due to being connected to The Artifact. Later circumstances of his own doing not only disconnect him from it, but also reboot the timeline, leaving him neurotypical.
  • Put on the Bus: He was completely absent in season 3, but The Bus Came Back in season 4.
  • Teen Genius: Able to create a way to detect theoretical phenomena in less then a month. Also able to create a serum on the fly to turn your average Joe into a genius among geniuses. When polymath Henry Deacon is stunned by your intellect, then you have one of the smartest persons in Eureka if not the world.

    Pilar Reed 

Pilar Reed

Played by: Adrienne Carter

https://static.tvtropes.org/pmwiki/pub/images/pilar_reed.jpg

Pilar is Zoe's best friend at school.


  • Best Friend: She's Zoe's closest friend in Eureka.
  • Brainy Brunette: She's a smart girl with long brown hair. She's introduced having created a device that controls neural muscle movements for a high-school competition.
  • Satellite Character: Her character resolves around Zoe.

Villains

    Dr. Beverly Barlowe 

Beverly Barlowe

Played by: Debrah Farentino

https://static.tvtropes.org/pmwiki/pub/images/beverly_barlowe.jpg

Beverly was the town psychiatrist. She secretly works for a mysterious organization known as "the Consortium", which has expressed a desire to exploit Eureka's innovations by whatever means necessary. A primary villain in Seasons 1 and 2, she is absent for all of season 3 but returns in the Season 4 Episode "Stoned" and meets with Dr. Trevor Grant in a clandestine meeting where she reveals her connection to him and his secret plans in 1947, thereby luring him into cooperating with her and her organization. She escapes capture when her plot is foiled.


    The Consortium 

Primary villains in Eureka. An organization, out to prevent "things mankind is not yet ready to use" from being misused. Of course they are the ones who get to decide who uses what, and to what end. The Consortium has existed for a very long time. Almost nothing is known about them, except for the fanaticism to their purpose.


Government Officials

    General Mansfield 

Mansfield

Played by: Barclay Hope

https://static.tvtropes.org/pmwiki/pub/images/general_mansfield.jpg

The liaison between Global Dynamics and the Department of Defense.


  • The Cavalry: Whenever a big enough disaster threatens Eureka, he'll be called in to help out.
  • The Ghost: After Season 4, he is mentioned several times but never appears.
  • Obstructive Bureaucrat: Gets in the way of Eureka's scientists.

    Senator Michaela Wen 

Michaela Wen

Played by: Ming-Na Wen

https://static.tvtropes.org/pmwiki/pub/images/michaela_wen.jpg

Head of the Senate Committee that oversees Global Dynamics.


Others

    Eva Thorne 

Eva Thorne

Played by: Frances Fisher

https://static.tvtropes.org/pmwiki/pub/images/eva_thorne_13.jpg

A corporate fixer that comes to Eureka to make it more profitable, but also seems to ho have personal, possibly nefarious reasons to come to the town.


  • Dark and Troubled Past: It was eventually revealed that she actually worked in Eureka in the 1940s and was involved in the development of the atomic bomb. During the tests a byproduct dubbed "Element X" was created, causing the other scientists involved, including her brother, to age and die within a month, while the speed of Thorne's aging slowed exponentially.
  • Jerk with a Heart of Gold: She initially appears to be a very antagonistic character who seeks to turn the charmingly chaotic Eureka everyone loves into a profit machine, has some definite Alpha Bitch vibes, and is implied to have more nefarious reasons for coming to Eureka. However, when Zoe is in danger due to her plans, she shows that she has a conscience. She immediately tells Carter what is going on, and even sacrifices her only chance for a cure for her condition to save Zoe. The Reveal of her Dark and Troubled Past didn't hurt either.
  • Put on a Bus: She disappeared mid-season 3.
  • Really 700 Years Old: As it turned out, she is actually over one-hundred years old, due to being exposed to some chemical.

    Lexi Carter 

Lexi Carter

Played by: Ever Carradine

https://static.tvtropes.org/pmwiki/pub/images/lexi_carter.jpg

Jack Carter's sister, who visits him in Eureka and stays for a few months. During her stay, she manages to become friends with Allison Blake, involves herself in the mayoral race, and attracts the attention of the town's resident costumed superhero, Captain Eureka.


  • Annoying Younger Sibling: Is this to Jack. She even has an Embarrassing Nickname for him.
  • Cool Aunt: Is this to Zoe, much to Jack's dismay.
  • Granola Girl: Played With. She's into yoga, new age, recycling, and tells Allison she doesn't have much trust in Western medicine. Though she does go the doctor for her pregnancy, and isn't much bothered by Eureka's technocentrism.
  • Screw This, I'm Out of Here!: After almost being devoured by a sentient blob, she and Duncan decide to get out of Eureka fast.
  • Sibling Yin-Yang: Interested in New Age spirituality, believing in being a free spirit, and having a very optimistic mindset, Lexi is the opposite of her straight-laced brother.

    Tess Fontana 

Tess Fontana

Played by: Jaime Ray Newman

https://static.tvtropes.org/pmwiki/pub/images/tess_fontana.jpg

Dr. Tess Fontana is an old friend of Allison Blake and world-renowned engineer and astrophysicist who is brought to Global Dynamics to oversee the reopening of Section 5.



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