History BrotherSisterIncest / LiveACtionTV

** In "The Killings at Badger's Drift", [[spoiler: an old woman discovers a brother and sister in an incestuous relationship and they murder her to keep her quiet]]. Later, [[spoiler: a busybody and her son, who likes to know everyone's secrets and is not averse to a spot of blackmail, end up dying as well]]. In the end, [[spoiler: the brother and sister end up committing a double suicide.]]
** In another, [[spoiler: a couple of HippieParents throw out their eldest children in TheSeventies, as their open-mindedness didn't extend to incest. They crash the car, but the sister survives, and settles down not too far away. Years later, the remaining sister is secretly banging the man she doesn't know is her nephew. ]]

* The ''Series/ChildrenOfDune'' miniseries. Specifically between Leto II and Ghanima.
** In [[Literature/ChildrenOfDune the book]], they actually end up getting married, but Ghanima is very firm on the subject: "I will not bear your children, brother," to which Leto replies; "I love you, my sister, but that is not the way my thought tends." Leto, actually, at least claims to be unable to reproduce after forming a bond with sandtrouts. Thus he marries his sister (it helps that he has a committee of ancestor advisors presided over by an Egyptian pharaoh in his head, and that nobles in ''Franchise/{{Dune}}'' have a system with both spouses and concubines), but her children (important to Leto's Golden Path) are fathered by a Corinno who also authors the entries of ''EncyclopediaExposita''. All this said, Stilgar is ''not'' amused.
** Paul and Alia have incestuous overtones in ''Literature/DuneMessiah''. At one point, Alia engages a sparring robot nude, before Paul stops her from killing herself (one wonders how long he was standing there). It's certainly not helped by the Bene Gesserit's clear intention to find a way of bargaining for a way to get Paul and his sister to produce an heir.

** The [=McPoyles=] are an entire family that participates in incest. The brothers "bang each other", and both are seen making out with their sister passionately in public.

** In the episode "Who got Dee pregnant?", Dennis is squicked by the possibility that he might have accidentally had sex with and impregnated Dee through a convoluted series of events at a Halloween party. His concerns turn out to be unfounded; however, it's never outright stated that they didn't have sex, only that he's not the baby daddy.
** Frank also fools around with his (non-blood) niece in an attempt to sleep with his dead brother's wife.

* This is pretty much the theme of the ''Series/MastersOfHorror'' episode "Imprint". It's also one of the ''least'' disturbing elements in it.
** In a major twist it's revealed that [[spoiler:the disfigured prostitute's parents were actually siblings. They were run out of their town and lived in poverty for the rest of their lives. The brother turned cruel and abusive towards his sister and was killed by his inbred daughter after he is implied to have raped her]].
** Christopher had a relationship with his younger sister. [[spoiler:It's later implied that he raped and killed her and was driven insane due to it.]]

* ''Series/TheUmbrellaAcademy'': Luther and Allison.

* ''Series/{{Taboo}}'': James and Zilpha once had a sexual relationship, and they still seem to be in love with each other at present. He even starts visiting her in her dreams in animal form ([[MaybeMagicMaybeMundane maybe]]) to have sex. [[spoiler:It's later consummated for real after she kills her abusive husband.]]

* ''Series/{{Taboo}}'': James and Zilpha once had a sexual relationship, and they still seem to be in love with each other at present. He even starts visiting her in her dreams ([[MaybeMagicMaybeMundane maybe]]) to have sex. [[spoiler:It's later consummated for real after she kills her abusive husband.]]

* On ''Series/{{Shadowhunters}}'', Jace and Clary, who have romantic feelings for each other and have kissed numerous times, are led to believe they are brother and sister in the episode "Blood Calls To Blood". It turns out not to be true and they wind up a couple.

** A ''major'' plot point: the fraternal twins Jaime and Cersei Lannister have been in a relationship since their childhood, and all of Cersei's children were fathered by Jaime, not her husband the king Robert Baratheon; she also sleeps with their cousin Lancel when Jaime is away fighting the Starks. Finally, the parents of said twins and their brother Tyrion were themselves first cousins. It's a wonder that the only genetic problem in that generation was Tyrion's dwarfism. Bran Stark's discovery of this dark secret is one of the catalysts of the series.
** Viserys was uncomfortably possessive of Dany's body, going so far as to strip her and fondle her, while commenting on her figure. Cersei mentions later that House Targaryen, to which they both belong, has practiced incest (mainly of the brother-sister variety) for three hundred years "''to keep bloodlines pure''", similar to the royal family of ancient Egypt. However, Aerys and Rhaella represent the first time it had been practiced in more than a century. Even before that, it was by no means a given; Aenys I married a Velaryon, Maegor I many women but the closest relative was his niece (and none of them had any children, anyways), Viserys I an Arryn and a Hightower in succession, Rhaenyra I her cousin once removed (paternal grandfather's brother's daughter's son) then her paternal uncle, Aegon III his cousin followed by a Velaryon, Viserys II a Lyseni from Essos, Maekar I a Dayne, and Aegon V a Blackwood. Aerys II's father Jaehaerys II did marry his sister, but he has been adapted out of the TV series. That means that the only monarchs to marry their sisters were Aegon I (Dany's greatx10 grandfather), Jaehaerys I (her greatx8 grandfather), Aegon II (her greatx6 uncle but no direct ancestor, as all of his children died), Baelor I (unconsummated, and therefore no direct ancestor, but her cousin five times removed), and Aerys II (her father). That said, many splinter branches of the family did marry their siblings, but these are the only monarchs to do so and two of them had their branches die out. In the novels it is implied that Viserys and Daenerys would have been married when they reached the appropriate age. In interviews, the actor who portrays him describes Daenerys as his "sister, wife, and daughter" all in one, often mentions that his character feels as though he "owns" Daenerys due to the fact that he ''would have'' married her if he still had the throne, and is even somewhat jealous of having to give her up to another man.

* A ''Series/CSIMiami'' episode played like the ''Law and Order'' episode above mixed with ''Manga/MarmaladeBoy'': a man has two families and his son and daughter fall in love. [[spoiler: The {{Squick}} comes in after they learn they're half-siblings and ''stay in the relationship anyway''. The half-siblings/couple kill dad when he wanted their unborn baby aborted.]]

** Viserys was uncomfortably possessive of Dany's body, going so far as to strip her and fondle her, while commenting on her figure. Cersei mentions later that House Targaryen, to which they both belong, has practiced incest (mainly of the brother-sister variety) for three hundred years "''to keep bloodlines pure''", similar to the royal family of ancient Egypt. However, Aerys and Rhaella represent the first time it had been practiced in more than a century. Even before that, it was by no means a given; Aenys I married a Velaryon, Maegor I many women but the closest relative was his niece (and none of them had any children, anyways), Viserys I an Arryn and a Hightower in succession, Rhaenyra I her cousin once removed (paternal grandfather's brother's daughter's son) then her paternal uncle, Aegon III his cousin followed by a Velaryon, Viserys II a Lyseni from Essos, Maekar I a Dayne, and Aegon V a Blackwood. Aerys II's father Jaehaerys II did marry his sister, but he has been adapted out of the TV series. That means that the only monarchs to marry their sisters were Aegon I (Dany's greatx10 grandfather), Jaehaerys I (her greatx8 grandfather), Aegon II (no direct relation as all of their children died but technically her greatx6 uncle), Baelor I (unconsummated, and therefore no direct relation, but her cousin five times removed), and Aerys II (her father). That said, many splinter branches of the family did marry their siblings, but these are the only monarchs to do so and two of them had their branches die out. In the novels it is implied that Viserys and Daenerys would have been married when they reached the appropriate age. In interviews, the actor who portrays him describes Daenerys as his "sister, wife, and daughter" all in one, often mentions that his character feels as though he "owns" Daenerys due to the fact that he ''would have'' married her if he still had the throne, and is even somewhat jealous of having to give her up to another man.

** Shows up in the Season 3 finale, when [[spoiler: pretty much ''immediately'' on learning that they've NotBloodSiblings, Lindsay tries to get Michael to marry her. Michael is naturally freaked out. Immediately after finding out about this, Gob hits on Lindsay because he always wants to steal girls from Michael.]]

* A bizarre example in ''Series/{{Merlin|2008}}'': The show started out heavily [[ShipTease hinting]] at a Morgana/Arthur pairing in Series 1. Then as Series 2 started, all of the build-up was dropped and the pairing was completely ignored. Then in Series 3, Arthur and Morgana were revealed to be half-brother and sister. [[FunnyAneurysmMoment Which makes all their interaction in Series 1 look]] [[{{Squick}} rather strange]] in retrospect.

* Nearly happens in ''Series/YoungDracula'' when Ingrid gets very close to kissing [[spoiler:Malik]] until he turns her down and then reveals in the next episode he's her half-brother. {{Subverted}} when it turns out that [[spoiler:he's not actually her half-brother, because his mother lied about Count Dracula being his father]].

* Nearly happens in ''Series/YoungDracula'' when Ingrid gets very close to kissing [[spoiler: Malik]] until he turns her down and then reveals in the next episode he's her half-brother.

** After Alex accidentally makes everyone forget who Justin is, their mother unknowingly advises Alex to date Justin, because they look 'cute' together, which Alex finds quite disgusting. Her mother then tells her that she had the same opinion about the relationship with her husband at first, but he eventually became her 'big cuddly bug', which Alex finds even grosser, implying that [[FreudianSlip she believes having a romantic relationship with her brother is more acceptable than the idea of her parents having sex]].

** And one of them was [[Series/{{Seinfeld}} Elaine Benes]]. And the other one's career brought even less success.

* An episode of ''Series/PrivatePractice'' had a married couple who found out they were half-brother and sister (same sperm donor as a father), and then wanted to stay together and have the sister's tubes tied. The writers then pulled a ''DebateAndSwitch'' when it turned out the brother knew before the couple got married.

* ''Series/ArrestedDevelopment'' turns out to have this in the finale, when [[spoiler: pretty much ''immediately'' on learning that they've NotBloodSiblings, Lindsay tries to get Michael to marry her. Michael is naturally freaked out. Immediately after finding out about this, Gob hits on Lindsay because he always wants to steal girls from Michael.]]
** In the episode "Family Ties", Michael hires Nellie, a woman whom he believes to be his long-lost sister but who is actually [[spoiler: a prostitute]]. When Gob is told that she might be his sister, his first reaction is that he should have gotten a family discount.
** Made even funnier by the fact that Creator/JasonBateman (Michael) and Creator/JustineBateman (Nellie) are brother and sister in RealLife. This is given a nod when Michael blurts out a request to marry him after learning how much money Nellie makes, then says "That's weird on so many levels."

* In ''Series/ItsAlwaysSunnyInPhiladelphia'', the [=McPoyles=] are an entire family that participates in incest. The brothers "bang each other", and both are seen making out with their sister passionately in public.

** Made even funnier by the fact that Jason Bateman (Michael) and Justine Bateman (Nellie) are brother and sister in RealLife. This is given a nod when Michael blurts out a request to marry him after learning how much money Nellie makes, then says "That's weird on so many levels."