Sequel Episodes in Live-Action TV.
The following have their own pages:
- According to Jim has the season 6 episode The Grill II, which is a sequel to the season 4 episode The Grill.
- Angel:
- In season "That Vision Thing", a prisoner is freed from another dimension by Angel, who then returns four episodes later to cause havoc.
- Faith's return in season four may be considered this to her appearance in season 1, "Five By Five" and "Sanctuary".
- "The Price" from the third season shows the consequences to the gang's actions in "Forgiving", two episodes before.
- The Avengers: "Return of the Cybernauts" is a sequel to "The Cybernauts", featuring the brother of the scientist who conceived the eponymous Killer Robots and died by them getting his hands on one of them to target John Steed and Emma Peel for revenge. It got another sequel in The New Avengers, "The Last of the Cybernauts", this time with a crippled villain seeking revenge against Steed using yet another remnant of Cybernaut tech.
- Bones' Gravedigger: first appearance in the second season, caught in the fourth, put on trial in the fifth.
- Buffy the Vampire Slayer:
- In the episode "The Wish" the vengeance demon Anyanka creates an Alternate Universe where vampires rule Sunnydale. By the end of the episode The 'Verse is returned to normal and Anyanka is left powerless. Later that season, the episode "Doppelgangland" was driven by Anyanka's attempts to regain her powers, and maybe warp reality back into a vampire run hellhole while she's at it.
- "I Was Made To Love You", an episode about Warren's robot girlfriend running amok in Sunnydale, ended with Spike getting him to build another robot. The payoff came in "Intervention" which involved Spike's newly-built Buffy-bot on the loose in Sunnydale.
- The consequences from the Charmed (1998) season 2 episode "Awakened" are explored near the end of the season in the episode "Astral Monkey".
- Community: "Advanced Dungeons and Dragons" from Season 2 had a follow-up "Advanced Advanced Dungeons and Dragons" in Season 5. Abed notes that sequel episodes often lead to the downfall of overly-proud creators, which gives him the resolve to do it so he can prove his superiority to them.
- Criminal Minds has Outfoxed, where the UNSUB is a copycat of a killer who first appeared in The Fox.
- CSI:
- 'The Execution of Catherine Willows' and its sequel 'What's Eating Gilbert Grissom?" which aired a few seasons later. Both focus on the 'Blue Paint Killer', who was actually a pair of killers, though only in the end of the second ep was the whole setup explained.
- In 'The Unsual Suspect' and 'Goodbye and Good Luck' there is a storyline with a Creepy Child girl suspect.
- CSI likes doing this with their serial killer cases...Paul Millander's storyline was spread over at least two seasons, with months of eps between them. Only the Miniature Killer's storyline episodes were relatively close together.
- CSI: NY:
- The leader of the "Tanglewood" Boys is arrested for murder in season one. Late in season 2, he, his cronies, and Danny are all implicated in a cold case when a body is discovered buried in the end zone at Giants Stadium in NJ.
- The t-shirt killer, Shane Casey. His cases seemingly ends in season 3, then he escapes and starts a whole new arc in season 6.
- In season 5, "Suspect X" gets away in the fifth episode, "Down the Rabbit Hole" and doesn't show up again until the fifteenth, "DOA for a Day."
- The ex-con arsonist in the season 9 premiere was cleared of the crime he was suspected of, but turned back up in the next one committing different types of crimes, got arrested and went to jail that time.
- In Enemy at the Door, the first-season episode "The Jerrybag" (in which a woman gets pregnant to a German soldier and has to decide whether to keep the baby after he's reassigned and killed in action) was followed up in the second-season episode "The Right Blood" (in which the soldier's family learns about the boy and tries to convince her to give him over to them).
- Family Matters:
- The Halloween Episodes for the final two seasons: "Stevil" and "Stevil II: This Time, He's Not Alone". They detail Steve's titular ventriloquist dummy coming to life and seeking to off not only his owner, but the entire household, as well, with the latter episode (hence the title) featuring an evil dummy modeled after Carl, named Carlsbad. Both episodes were All Just a Dream.
- The Flash:
- In The Flash (1990), the episodes "The Trickster" and "Trial of the Trickster" were several episodes apart but they were combined into one two-part "movie" for VHS release.
- In The Flash (2014), "King Shark" is a sequel to a minor plot in "The Fury of Firestorm", this time focusing on the titular villain, whose initial appearance lasted only about a minute.
- Friends : "TOW the Embryos" and "TOW All the Haste" about Rachel & Monica and Joey & Chandler switching apartments. They both even start the same, with Rachel being rudely awakened in the morning.
- Hercules: The Legendary Journeys has done this a number of times. For example, there was the episode 'King For A Day', where Iolaus has to impersonate a missing king. A season or two later came 'Long Live The King', where Iolaus has to impersonate the king again.
- How I Met Your Mother:
- First there was "Slap Bet" where Marshall won the right to slap Barney in the face five times, as hard as he can, at any moment he chooses. Next season, we got the episode "Slapsgiving", where Marshall decides to dole out one of his slaps on Thanksgiving Day and spends the whole episode putting Barney through a Paranoia Gambit. Two more years pass, and finally "Slapsgiving 2: Revenge of the Slap" arrives: it's Thanksgiving again and Marshall decides to let Ted and Robin slap Barney in his place, and, once more, Barney spends the whole episode tortured by the knowledge of what's to come.
- The first season Halloween Episode "The Slutty Pumpkin" establishes how Ted once met a girl in a pumpkin costume at a Halloween party who he had amazing chemistry with, but lost her number and has spent every Halloween since hoping to find her again. He finally meets her for real in the seventh season episode "The Slutty Pumpkin Returns".
- Season 4's "Sorry, Bro" can be seen as a sequel of sorts to the previous season's "The Platinum Rule". Both episodes have almost identical framing devices, in which the gang sits at the bar telling each other four stories, all while trying to talk Ted out of making a mistake. Also, while Ted and Marshall's stories in "Sorry, Bro" are completely new, Barney and Robin explore the aftermath of their stories from "The Platinum Rule".
- iCarly:
- iThink They Kissed, where Carly finds out that Sam and Freddie shared a First Kiss is the Sequel Episode to iKiss where the First Kiss occurred.
- "iPsycho" and "iStill Psycho" (and the Sam & Cat episode "#SuperPsycho").
- It's Always Sunny in Philadelphia:
- "Gun Fever 2: Still Hot" (season 9) is a sequel to "Gun Fever" (season 1).
- "The Gang Makes Lethal Weapon 6" (season 9) is a sequel to "Dee Reynolds: Shaping America's Youth" (season 6).
- "The Nightman Cometh" (season 4) expands on a plot point from "Sweet Dee is Dating a Retarded Person" (season 2).
- The plot of "The Gang Finds a Dead Guy" (season 1) gets continued in "Pop-Pop: the Final Solution" (season 8).
- "The World Series Defense" (season 5) and "The Gang Gets Stranded in the Woods" (season 6) both deal with the Gang's fondness for the Philadelphia Phillies and Mac's Celeb Crush on Chase Utley.
- "The Gang Gives Back" (season 2) is a sequel to "The Gang Goes Jihad", which precedes it by a couple of episodes.
- Law & Order:
- "Coma" featured comedian Larry Miller as a nightclub owner whose first wife died under mysterious circumstances. He was the prime suspect until a junkie came forward and confessed to the crime. The last scene of that episode was the cops viewing a videotape where the junkie was shown to have performed at the suspect's nightclub. Two years later (in an episode called "Encore"), Miller's character returns after his second wife is murdered. He looks like he's able to evade justice again, but this time his would be third wife is revealed to have helped screw up the investigation. The cops get her to cooperate by reminding her of what happened to the suspect's first two wives.
- The first season episode "Indifference", is based on the Joel Steinberg
case. In that episode, not-Steinberg was convicted and sent to jail. Around the time the real Steinberg was released (a decade and a half later), the episode "Fixed" had the not-Steinberg character be released from jail, only to be horrifically maimed in a hit-and-run and become the victim of the story.
- In Legends of Tomorrow, the season 2 episode "Outlaw Country" is a sequel to the season 1 episode "The Magnificent Eight", as the Legends return to the Old West and once again work with Jonah Hex.
- Merlin has three Lancelot-centric episodes (though he appeared in a couple more) that encompass his Character Arc: Lancelot, Lancelot and Guinevere and Lancelot du Lac, making him the only character to have three episodes named after him.
- Miami Vice has two examples, both of which open with a Previously on… segment summarizing the first episode. In the fourth-season episode "Rock and a Hard Place," two scummy record executives who first appeared earlier in the season in "Like a Hurricane" come back to try to ruin Caitlin's career. Later in the season, in "Deliver Us From Evil," a murderer whom Crockett accidentally got off death row in the third-season episode "Forgive Us Our Debts" returns and kills Caitlin.
- Modern Family's second-season Valentine's Day Episode, "Bixby's Back", is a sequel to the first season's "My Funky Valentine", at least as it applies to Claire and Phil.
- Psych:
- The series has an episode called "Extradition: Canada" and another more recent one called "Extradition: Canada 2 (The Actual Extradition Part)".
- The season finales of seasons 3-5: "An Evening With Mr. Yang", "Mr. Yin Presents ...", and "Yang 3 in 2D".
- Our Miss Brooks: "Trial by Jury" aired in early in the second season of Our Miss Brooks. In that episode, Miss Brooks' car is damaged when her brakes give out and it rolls downhill and hits a fruit stand (it was a Sound-to-Screen Adaptation of "Traffic Court"). "Brooks' New Car" references the incident. In this episode, Mr. Conklin's brakes give out and his vehicle hits the same fruit stand. Later in the episode, Mrs. Davis accidentally runs into the fruit stand driving downhill. The fruit stand vendor finally decides to leave town.
- Quantum Leap:
- The fifth-season episode "Deliver Us From Evil" is a sequel to the second-season episode "Jimmy": Sam leaps into Jimmy LaMotta a second time, a couple years after his first leap, and finds that the happy future he should have caused is failing to occur (thanks to an Evil Counterpart whose goal is to Make Wrong What Once Went Right). This episode gets its own sequel later that season when the evil leaper returns in "Return of the Evil Leaper".
- A rare cross-medium sequel episode: Issue 9 of the tie-in comic book, "Up Against a Stonewall", is a sequel to the episode "Good Night, Dear Heart".
- Red Dwarf has the Series VI episode "Emohawk: Polymorph II", which is a sequel to the Series III episode "Polymorph". The three-part special "Back to Earth" also acts as a sequel to the Series V episode "Back To Reality".
- Scrubs: Some of the episodes are titled "His/Her/Their Story" (the usual episodes are titled as "My ___") with Roman Numerals used to indicate which part it is. These episodes focus on characters other than JD.
- Stargate SG-1:
- Thor's Chariot is a sequel to Thor's Hammer showing the fallout to SG-1's actions in the earlier episode.
- SG-1 also has what amounts to a prequel episode: "2010" is set entirely in a Bad Future, with the future versions of SG-1 working to send back a warning. The episode ends when they succeed, then a season later in "2001" the events referenced as history in 2010 start happening and they have to decipher the Note to Self to avert it.
- Star Trek features several of these, spanning multiple series:
- Star Trek: The Original Series had an unusual example in the two-part episode "The Menagerie", related to the show's lengthy development period. The first pilot, "The Cage" was rejected by executives, who liked the concept but disliked the characters. The eventual series was substantially recast. "The Menagerie" re-used most of "The Cage" as flashbacks to a mission which Spock had taken part in with an earlier Enterprise crew, with the rest of the story depicting the main-series cast dealing with the subsequent consequences of those events. Hence "The Menagerie" was a Sequel Episode to an episode which, at the time, had never been broadcast.
- The TNG episode "The Naked Now", for instance, was a sequel to the TOS episode "The Naked Time". "Ship in a Bottle" from Season 6 is a sequel to "Elementary, Dear Data", with the Professor Moriarty hologram returning and demanding Picard fulfill the promise made to him in the earlier episode.
- DS9 delighted in doing this to TOS, with "Trials and Tribble-ations" as a sequel to the iconic "The Trouble with Tribbles", and a whole series of sequels exploring the mirror universe introduced in TOS' "Mirror, Mirror".
- Star Trek II: The Wrath of Khan could be seen as a feature-length sequel to "Space Seed".
- Voyager: Course: Oblivion is a sequel episode to Demon.
- Ultra Series:
- Ultra Q did two episodes in which a Monster of the Week returns with a vengeance. They featured Peguila and Garamon respectively, with the latter's return episode revealing the alien invaders who had originally sent the first Garamon to attack Earth.
- The sixteenth episode of Ultraman was one for its second episode, as the Baltans turn out to have survived Ultraman's destruction of their spaceship and they seek revenge.
- In Ultraman Tiga, the episode "Requiem to Darkness", in which Horii's friend Ryosuke transforms himself into the monster Evolu using alien cells, got a sequel towards the end of the show called "Goodbye to Darkness", where an escaped lab monkey mutated by the same cells into a new creature called Metamorga (naming pattern, anyone?) appears, while also grappling with some of the leftover issues from the previous episode, notably Ryunosuke's girlfriend Sayaka and her feelings for Horii.
- Ultraman Dyna did a sequel to the above-mentioned Tiga episodes called "The Light and Shadow of Youth", which also served as a sequel to a Dyna episode called "Battle! Monster Island!" (which had a mad scientist and his mutant monster Neosaurus), as the mad scientist's apprentice perfects the alien cells to create super-soldier clones and eventually turn himself into the monster Zomborg. Dyna also did a sequel to the Tiga episode "The Phantom Dash" called " "The Phantom Dream Bird", in which a legendary bird-woman of ill omen named Kokakuchu warns Mayumi that "the tragedy will happen again", referencing her boyfriend's death at the hands of the monster Gazote in Tiga. Kokakuchu soon appears at the power plant Gazote attacked, and the brother of Mayumi's late boyfriend is there as well...
- Ultraman Max did one to Ultraseven's "The Targeted Town" called "The Untargeted Town", in which the alien Metron turns out to have survived his encounter with Seven and has restarted his Hate Plague schemes with cellphone signals instead of cigarettes. The episodes even have the same director! There was also "A Different World", which serves as a sequel to the Multi-Part Episode that had Red King and Pygmon/Pigmon and the episode "A Bright World", as the alien Shama returns from the latter episode to destroy DASH and Ultraman Max with a device that summons a new Red King from a parallel universe where it was never destroyed, but accidentally brings in Pygmon too.
- Ultraman Mebius' "The Monster Master's Legacy" follows up an episode of Return of Ultraman called "The Boy and the Monster Master" by featuring the son of the benevolent alien Mates (murdered in an incident of Fantastic Racism) coming to Earth to avenge his father's death.
- Ultraman Orb's "The Girl with the Blue Ribbon" sees the SSP and Gai discover that their one-off alien foe Maddock from "A Heart That Won't Flee" has somehow reincarnated himself in the body of an amnesiac teenage girl and has also resurrected his monster Hyper Zetton Deathscythe.
- The original 1966 Ultra Q had the episode "Challenge from the Year 2020", featuring a time-traveling alien from the then-future. When the actual year 2020 rolled around 54 years later, Ultraman Z homaged it with "Rechallenge from the Year 2020", where another member of the same race starts abducting people as the original did.
- The Wonder Years: The fifth season premiered with "The Lake", where Kevin meets a girl named Cara while on vacation at the lake. The season ended with "Back to the Lake", where Kevin returns to the location specifically to reunite with Cara.
- The X-Files:
- A first season episode "Tooms" was a sequel to an episode earlier in the season, "Squeeze", one of the few they did like that. In the first ep they caught the Monster of the Week and in the later ep he was released from psychiatric ward. It's pretty damn hard to prosecute a supernatural crime...
- The episode "Irresistible" had the sequel "Orison". They featured a creepy serial killer obsessed with dead women and Agent Scully. In "Orison", he escapes from prison and tries to find Scully.
- "Pusher" had the sequel "Kitsunegari". "Pusher" is considered a brilliant episode with a great antagonist for Mulder. "Kitsunegari" is disappointing as he inexplicably became helpful and his previously-not-mentioned twin sister has the same paranormal abilities (which he gained because of his untreated brain tumour).
