Lucy PrestonA history professor; provides the group with her knowledge.
Played by: Abigail Spencer
- Batman Grabs a Gun: In "The Murder of Jesse James", Lucy kills him to make sure he doesn't escape from prison, to keep the timeline in tact.
- Guile Heroine: Is good at using her historical insight to manipulate and persuade historical figures the group encounters.
Played by: Matt LanterA U.S. Army Master Sergeant and Delta Force operative; serves as the muscle for the group.
- Abusive Parents: His father was abusive and forced him to help him in his crimes; Wyatt ran away from home in his late teens.
- Crazy Jealous Guy: Towards Lucy in season 2, despite being in a relationship with his resurrected wife Jessica at the time. In Season 2, we also see that he was like this to Jessice when they were married.
- Sensitive Guy and Manly Man: The Manly Man to Rufus's Sensitive Guy.
Played by: Malcolm BarrettOne of the engineers who developed the Lifeboat; pilots it during missions.
- Black and Nerdy
- Nerds Speak Klingon: Is an engineer, loves sci-fi and understands Klingon.
- Nice Guy
- Rags to Riches: "Riches" might be overstating it, but he came from a poor, gang-infested neighborhood in Chicago before he was discovered by Connor at a science fair at a young age.
- Science Hero
- Sensitive Guy and Manly Man: The Sensitive Guy to Wyatt's Manly Man.
Played by: Goran VisnjicThe villain of the series; a former NSA agent who steals the Mothership and, along with a group of accomplices, uses it to travel through time and sabotage major historical events.
- Anti-Villain: Does some atrocious things throughout history, but it's to rid the world of a secret organization that killed his family and continues to control the country.
- Big Bad: At first, at least, until Rittenhouse takes over that role.
- Even Evil Has Loved Ones:
- His goal in what he's doing is to undo the murders of his wife and daughter.
- In "Space Race", he does what Wyatt has been wanting to do for his wife since the start of the series and uses his knowledge of the future to undo the death of his older brother, who died of a bee sting shortly before Flynn was born.
- Even Evil Has Standards: Zigzagged in "The Capture of Benedict Arnold, where he is conflicted about killing David Rittenhouse's young son in order to definitively cut off the head of his organization. At first, he is unable to go through with it, but by the time he seems to make a serious attempt, the boy has run away.
- Played straight in Party at Castle Varlar, where he tells Lucy that the fact he has to work with Nazis to stop Rittenhouse sickens him, but the ends justify the means.
- HeelFace Turn: Officially joins the Lifeboat crew in Season 2.
- No Place for Me There: Has no intentions of going back to his wife and daughter when he's managed to bring them back because of the horrible things he's done to make it happen.
- Well-Intentioned Extremist: It's hard to disagree with him about Rittenhouse, but undoing the history of his own country definitely counts as extreme.
Played by: Paterson JosephCEO of Mason Industries, the company that created the Lifeboat.
- Ambiguously Evil: Throughout the first season, he works on behalf of Rittenhouse and pushed Rufus into doing some questionable things. Ultimately, he turns out to be on the side of good and to have been plotting against them.
- Evil Brit: Subverted; he was secretly working against Rittenhouse the whole time.
- Trapped in Villainy: Rittenhouse bailed his company out during a financially difficult time and he's been stuck serving them ever since.
Played by: Sakina JaffreyA Homeland Security agent and the one in charge of the task force.
- Disappeared Dad: Her father was killed when she was a child.
- Meaningful Rename: Changed her last name to that of the female cop who comforted her after she saw her father get killed.
- My Beloved Smother: Her mother, who is quite conservative, was extremely uncomfortable with her becoming a cop when she was younger.
- Straight Gay: Is married to a woman and has children with her.
- Reasonable Authority Figure
Played by: Matt FrewerA senior scientist involved in the time machine project; was recruited by Flynn in his war against Rittenhouse.
- Token Good Teammate: By far the most moral member of Flynn's team and the one shown to have the most doubts about what they do to further their plans.
Played by: John GetzAn initially unnamed representative of Rittenhouse.
- Archnemesis Dad: He is secretly Lucy's biological father.
- Even Evil Has Loved Ones: Returns from prison in "The Miracle of Christmas" at the behest of Agent Christopher to help them find Emma, who by then has taken over Rittenhouse (or rather, what little remains of it) so that they can recover the Mothership and use it to save Lucy, Wyatt, Rufus and Jiya. When Emma questions what they promised him, he simply responds that he's doing it to help save Lucy from her (and to get protection for his teenage son), and that despite everything, he still cares about her.
- Jerk with a Heart of Gold: Despite all the bad things he'd done for Rittenhouse, he still cares for his family (particularly his children), and agreed to help Agent Christopher because he didn't want Emma to kill Lucy.
- "The Reason You Suck" Speech: Delivers an epic one to Emma in the Grand Finale, when explaining why he agreed to help Agent Christopher save Lucy (along with Wyatt and Rufus), hitting her right where it hurts."It's a family thing, Emma. Something You'll never have or understand."
- Mouth of Sauron: One of the few members of Rittenhouse shown in the open and the one who speaks for it for most of Season 1.
- Villain with Good Publicity: In his public life, he is a respected pediatric surgeon.
Played by: Claudia DoumitA Mason Industries employee who worked on the time machine; becomes Rufus's girlfriend during the first season.
- Nerds Speak Klingon: Is a scientist and can read and write Klingon, like Rufus.
- Seers: After travelling with the team in the lifeboat while it's only fitted for three results in her becoming able to see the future.
- Took a Level in Badass: In the Season 2 finale, in part due to having to fend for herself in 1880s San Francisco, she becomes tougher than he was before.
Played by: Bailey NobleLucy's (half-)sister.
- Deader Than Dead: In Season 2, Emma mentions that she went on a series of time travels to ensure that Amy would definitely stay non-existent.
- First-Episode Spoiler: Her being wiped out of history is revealed almost at the end of the pilot episode.
- Ret Gone: Her existence is undone as a result of the events of the group's first travel in time, prompting Lucy to try and restore it.
Played by: Susanna ThompsonLucy's mother.
- Archnemesis Mom: Serves essentially as a Big Bad for Season 2 and is Lucy's mother.
- Big Bad Duumvirate: For Season 2, together with Nicholas Keynes.
- Evil All Along: In the Season 1 finale, it is revealed that she and her entire family are long-time members of Rittenhouse.
- Even Evil Has Loved Ones: In spite of their differences in Season 2, usually does what she can to protect Lucy, though it seems to be in no small part because she's hoping that she will join Rittenhouse.
- Walking Spoiler: It's difficult to talk about her much without giving away a huge spoiler for Season 1.
- We Can Rule Together: Desperately hopes for Lucy to join Rittenhouse and embrace her legacy.
Played by: Michael RadyA soldier of World War I and the original architect of Rittenhouse's plan to use time travel to alter history for its own benefit. Also Lucy's mother's grandfather.
- Big Bad Duumvirate: Together with Clara Preston in Season 2.
- Bunny-Ears Lawyer: In his first episode in the present, he prints out the entirety of Wikipedia because reading it on a tablet strained his eyes too much and he keeps asking for pickled eggs. He is, however, still valued by the organization as a visionary leader.
Played by: Annie WerschingOne of Rittenhouse's most loyal soldiers.
- Abusive Parents: Had a physically abusive father, and still has the scars to show for it. Her mother eventually took Emma and fled.
- Even Evil Has Standards: Temporarily joins forces with the Lifeboat team in "Mrs. Sherlock Holmes", in which Rittenhouse tries to prevent American women from being allowed to vote, because she values female independence too highly to let that happen.
- Evil Redhead: Has red hair and almost exclusively works for bad people.
- Genius Bruiser: A very competent fighter who also studied at Caltech and is able to pilot the Mothership.
- Self-Made Woman: Takes pride in making it into Rittenhouse on her own merits rather than relying on family connections; this also makes her resent Lucy, who belongs to one of the organization's most prominent families and keeps being attempted to be recruited.
- The Starscream: In the Season 2 finale, she gets fed up with Clara and Nicholas' insistence on sticking to bloodlines to decide Rittenhouse's leadership and Clara's protection of Lucy and kills them both, intending to assume leadership of Rittenhouse, being the only one left on their side who can pilot the time machines.
Played by: Tonya GlanzWyatt's wife, who was murdered years ago by an unknown person. In Season 2, her death is undone.
- Back from the Dead: Her death is undone in "Hollywoodland".
- The Lost Lenore: For Wyatt, before her murder was undone.
- The Mole: Was recruited by Rittenhouse when they saved her brother from dying of leukemia in the 1980s.
John Wilkes Booth
Played by: Kelly Blatz
Appeared in: "The Assassination of Abraham Lincoln"The assassin who killed Abraham Lincoln in 1865.
- Awesome, but Impractical: Insists on using a single-shot pistol native to his time instead of the far more practical ones Flynn brought from the present because he thinks the former is more dramatic.
- Dude, Where's My Respect?: Is said to have lived in the shadow of his more successful older brother and clearly resents it.
- Ineffectual Sympathetic Villain: When he starts working with Flynn, he gets portrayed more like an egotistical dope than the cold-blooded killer you'd expect. More or less Truth in Television: if Booth had just shot Lincoln and then slunk out the back door, there is a very good chance we would have no idea who killed Old Abe to this very day. Instead, Booth, being a showman at heart, jumped off of the balcony Lincoln was seated on so he could land on the stage and give a Bond One-Liner, breaking his leg in the process and allowing him to be easily identified. This subsequently led to his brutal death at the hands of a posse of law enforcers.
Played by: Sean Maguire
Appeared in: "Party at Castle Varlar"A British spy (and future writer of a certain series of spy novels) encountered by the Lifeboat group in Nazi Germany during World War II.
- Everyone Has Standards: Is a professional, fairly cold-blooded spy, but even he is willing to kill Werner von Braun because of his involvment in the Blitz bombings on London.
Wernher von Braun
Played by: Christian Oliver
Appeared in: "Party at Castle Varlar"A German aerospace engineer who helped them develop their rocket weapons and was later recruited by the Allies and did the same kind of work for the United States.
- For Science!: His ultimate goal with his work is said to be to eventually take mankind to the moon and he couldn't care less about who he works for to get there. Unfortunately, he also doesn't care about the people his work kills along the way.
- Karma Houdini: His capture by Fleming and later recruitment by Operation Paperclip is portrayed as this.
Played by: Curtis Caravaggio
Appeared in: "The Capture of Benedict Arnold"The American Continental Army commander who became infamous for defecting to the British.
- Dude, Where's My Respect? / Dude, Where's My Reward?: His betrayal is said to have been caused by sacrificing a lot for the sake of the Continental Army and his resentment led to him joining the British.
- Historical Villain Upgrade: In addition to his infamous real life betrayal, here he is also a founding member of a secret conspiracy.
Played by: Colman Domingo
Appeared in: "The Murder of Jesse James"A sheriff in the old West said to have become a major inspiration for The Lone Ranger character.
- Black and White Morality
- Incorruptible Pure Pureness: One of the most honest and upstanding lawmen of his time.
Bonnie Parker and Clyde Barrow
Played by: Jacqueline Byers (Bonnie) and Sam Stryke (Clyde)
Appeared in: "The Last Ride of Bonnie and Clyde"A couple of outlaws active in the South during the Depression.
- Adaptational Heroism: Unlike the real Bonnie and Clyde, the Timeless versions are portrayed more sympathetically and avoid hurting innocent bystanders, while the real ones were more homicidal and violent.
- Even Evil Has Loved Ones: Devoted to each other.
Played by: Armin Shimerman
Appeared in: "The Capture of Benedict Arnold"A figure from early American history; in the show, however, he was secretly the founder and namesake of Rittenhouse.
- Clocks of Control: Clocks become a character motif for him, representing his organization's secretive methods of control.
- Dirty Old Man: Decides to kill most of the group - except Lucy whom he wants to use for breeding first.
- Historical Villain Upgrade: Practically the polar opposite of the real David Rittenhouse.
Played by: Sarah Sokolovic
Appeared in: "Mrs. Sherlock Holmes"The first female Special Assistant United States Attorney as well as a skilled and observant detective. Helps the Lifeboat team in New York 1919.