History Main / CainAndAbelAndSeth

* ''VideoGame/F.3.A.R.''s [[spoiler: Third Child]] is hinted in the good ending to have a brighter future than [[spoiler: its brothers.]]

* ''VideoGame/TeamFortress2's Gray Mann not only twists the family dynamic like Seth, [[spoiler: He one-ups Cain, and murders ''both'' his brothers.]]

* Gray Mann not only twists the family dynamic like Seth, [[spoiler: He murders both his brothers like Cain.]]

Consider the trope namers. Many people know the story of CainAndAbel, the first children born in the Abrahamic religions. AsYouKnow, Cain kills Abel, and was banished by God. What fewer people know, is that AdamAndOrEve had several more kids, one of whom was named Seth. Seth would replace Abel as the "good" son, and while both he and Cain would have children (with their unnamed sisters), Cain's lineage would be cursed, and would eventually all be doomed by the Great Flood. Noah and his family were descended from Seth, and as the only survivors of the Flood, this means that all humans are descended from Seth, taking both of their places as the future of humanity.

Consider the trope namers. Many people know the story of CainAndAbel, the first children born in the Abrahamic religions. AsYouKnow, Cain kills Abel, and was banished by God. What fewer people know, is that AdamAndOrEve had several more kids, only one of whom was named, Seth. Seth would replace Abel as the "good" son, and while both he and Cain would have children (with their unnamed sisters), Cain's lineage would be cursed, and would eventually all be doomed by the Great Flood. Noah and his family were descended from Seth, and as the only survivors of the Flood, this means that all humans are descended from Seth, taking both of their places as the future of humanity.

* In ''Mortal Kombat Armageddon'' Rain's Ending [[spoiler: it is revealed he is the third son of Argus - the other two being rivals Dagon and Taven]]

* In ''{{Supernatural}}'', Sam and Dean have spent most of their twenty-some years with only each other as dependable family. Eventually, in the episode entitled ''"JumpingTheShark"'' including references to [[TheBradyBunch Cousin Oliver]], they find out that their father had a child several years after their mother died, whom he kept from the hunter's life to protect him. The brothers immediately argue about whether to train him or to spare him from their life. It turns out [[spoiler:he's already been killed in revenge against their father, and they've been dealing with a ghoul]].

* ''{{Charmed}}'' revolved around three sisters, the [[TitleDrop Charmed Ones]]. One of the sisters died early in the show, so a half-sister was added down the line to complete the trio. The two elder sisters (Piper and Phoebe) tried to enlist the help of the new sister (Paige), who was reluctant to join them and almost joined the {{Dark Side}}. There were also episodes which focused on how Paige's personality affected the dynamics within the family (namely, an episode where Paige tries to rearrange everything in the house which causes tension between her and Piper). Paige was also far more emotional on decisions concerning the past of their grandparents.

* In ''{{Supernatural}}'', Sam and Dean have spent most of their 20-something year lives with only each other as dependable family. Eventually, in the episode entitled ''"JumpingTheShark"'' including references to [[TheBradyBunch Cousin Oliver]], they find out that their father had a child several years after their mother died, who he kept from the hunter's life. The brothers immediately argue on whether to train him or to spare him from their life. When Adam eventually makes an appearance [[spoiler: as himself, after he's been brought BackFromTheDead, ''[[BackForTheDead for]]'' AFateWorseThanDeath, he doesn't get along with either of the brothers that never found him and let him die. In Season 6, when given the option to save either Sam or Adam from eternal torment in Lucifer's cage, Dean doesn't even hesitate in choosing Sam]]. Simultaneously, within the archangels, [[ArchangelLucifer Lucifer]] and [[ArchangelMichael Michael]] are seeking the same Armageddon, each thinking they would win. Winchester brother intervention gets [[ArchangelGabriel Gabriel]] involved, introducing this dynamic between them to the viewers. Gabriel takes neither side, [[spoiler: and is responsible for the plan to seal the both of them, ending the conflict]].

* Venus de Milo of the short lived ''NinjaTurtlesTheNextMutation'' series was a female turtle with the same MetaOrigin. But she got so much hate from the [[FanonDiscontinuity fans]] ''[[DisownedAdaptation and creators of the original series]]'', and the show got terrible ratings and was cancelled, so the whole thing is [[CanonDiscontinuity noncanonical]] now.

* In ''OnePiece'', Luffy and Ace are revealed to [[spoiler: not be related, and have a third BloodBrothers named Sabo. In their youth, he was the physical midpoint of the three, and was TheSpock in their three man band. The story is told entirely through flashback, as Sabo is assumed dead and thus a PosthumousCharacter. His death, and Ace's subsequent death]], To the viewers, this complicates every ''previous'' interaction between Luffy and Ace, their current situation, and [[GallowsHumor all those that would follow]]. Additionally, Ace's tattoo and Luffy and Ace's relationships with their TrueCompanions take new significance. In a cover, it is shown that [[spoiler: had Sabo lived, the three would be together, and to cement this "Good Future", Ace's tattoo loses its meaningful misspelling]].

* The show ''Sisters'' originally had 4 sisters: Alex, Teddy, Georgie and Frankie. In the 4th season they discover they have a younger half-sister named Charley who was born from an affair their father had. Charley was a guest star in seasons 4 and 5 but when the actress who played Frankie left the show Charley (now with a different actress) became a regular character during the sixth season.

* Venus de Milo of the short lived ''NinjaTurtlesTheNextMutation'' series was a female turtle with the same MetaOrigin. But she got so much hate from the fans ''[[DisownedAdaptation and creators of the original series]]'', and the show got terrible ratings and was cancelled, so the whole thing is [[CanonDiscontinuity noncanonical]] now.

* Venus de Milo of the short lived ''NinjaTurtlesTheNextMutation'' series was a female turtle with the same MetaOrigin. But she got so much hate from the fans ''and creators of the original series'', and the show got terrible ratings and was cancelled, so the whole thing is noncanonical now.

* Late introduction of Shizuku in ''CandyBoy'', with her BigSisterWorship of Yukino and slight SiblingRivalry with Kanade, really shakes up the twins' dynamic.

* In ''OnePiece'', Luffy and Ace are revealed to [[spoiler: not be related, and have a third BloodBrother named Sabo. In their youth, he was the physical midpoint of the three, and was TheSpock in their three man band. The story is told entirely through flashback, as Sabo is assumed dead and thus a PosthumousCharacter. His death, and Ace's subsequent death]], To the viewers, this complicates every ''previous'' interaction between Luffy and Ace, their current situation, and [[GallowsHumor all those that would follow]]. Additionally, Ace's tattoo and Luffy and Ace's relationships with their TrueCompanions take new significance. In a cover, it is shown that [[spoiler: had Sabo lived, the three would be together, and to cement this "GoodFuture", Ace's tattoo loses its meaningful misspelling]].

[[AC: ComicsBooks]]

[[AC: AnimeAndManga]]

* In ''OnePiece'', Luffy and Ace are revealed to [[spoiler: not be related, and have a third BloodBrother named Sabo. In their youth, he was the physical midpoint of the three, and was TheSpock in their three man band. The story is told entirely through flashback, as Sabo is assumed dead and thus a PosthumousCharacter. His death, and Ace's subsequent death,]] To the viewers, this complicates every ''previous'' interaction between Luffy and Ace, their current situation, and [[GallowsHumor all those that would follow]]. Additionally, Ace's tattoo and Luffy and Ace's relationships with their TrueCompanions take new significance. In a cover, it is shown that [[spoiler: had Sabo lived, the three would be together, and to cement this "GoodFuture", Ace's tattoo loses its meaningful misspelling.]]

[[AC: {{Comics}}]]
* In ''XMen'', a slip up by Mr. Sinister introduced an example. As explained on the TangledFamilyTree page, Scott Summers was introduced as an orphan, then met and established a relationship with his brother Alex. This lasted for quite some time, before Sinister hinted that there was at least one more brother out there. After a lot of plot changes and WordOfGod statements, the brother was set as Vulcan, a supervillain emperor.

* In {{Supernatural}}, Sam and Dean have spent most of their 20-something year lives with only each other as dependable family. Eventually, in the episode entitled ''"JumpingTheShark"'' including references to [[TheBradyBunch Cousin Oliver]], they find out that their father had a child several years after their mother died, who he kept from the hunter's life. The brothers immediately argue on whether to train him or to spare him from their life. When Adam eventually makes an appearance [[spoiler: as himself, after he's been brought BackFromTheDead, ''[[BackForTheDead for]]'' AFateWorseThanDeath, he doesn't get along with either of the brothers that never found him and let him die. In Season 6, when given the option to save either Sam or Adam from eternal torment in Lucifer's cage, Dean doesn't even hesitate in choosing Sam]].
** Simultaneously, within the archangels, [[ArchangelLucifer Lucifer]] and [[ArchangelMichael Michael]] are seeking the same Armageddon, each thinking they would win. Winchester brother intervention gets [[ArchangelGabriel Gabriel]] involved, introducing this dynamic between them to the viewers. Gabriel takes neither side, [[spoiler: and is responsible for the plan to seal the both of them, ending the conflict.]]
* In {{Charmed}}, the show revolved around three sisters, the [[TitleDrop Charmed Ones]]. One of the sisters died early in the show, so a half-sister was added down the line to complete the trio. The two elder sisters (Piper and Phoebe) tried to enlist the help of the new sister (Paige), who was reluctant to join them and almost joined the {{Dark Side}}. There were also episodes which focused on how Paige's personality affected the dynamics within the family (namely, an episode where Paige tries to rearrange everything in the house which causes tension between her and Piper). Paige was also far more emotional on decisions concerning the past of their grandparents.
* Venus de Milo of the short lived NinjaTurtlesTheNextMutation series was a female turtle with the same MetaOrigin. But she got so much hate from the fans ''and creators of the original series'', and the show got terrible ratings and was cancelled, so the whole thing is noncanonical now.
* ''{{Gossip Girl}}'', where Chuck becomes Serena and Eric's adoptive brother when their parents are married. The siblings already knew Chuck, and because of his earlier attempt to rape Serena, neither of them trust him. While Eric is the first to come closer to Chuck, Serena still distrusts him and blames him for sending her porn magazines. [[spoiler: Though, as it turns out, they were sent by someone else. Their relationship gets even worse when Chuck's father dies.]]

* In TheVentureBros, [[spoiler: Dermott Fictel is introduced, and almost instantly separates Dean and Hank, as he is more similar to Hank, following the brothers' DivergentCharacterEvolution. He's hinted as being Brock Samson's son, but he is actually Rusty's accidental child, thus making him the third Venture brother, and strangely enough the only brother with a confirmed mother.]]

* In ''OnePiece'', Luffy and Ace are revealed to [[spoiler: not be related, and have a third BloodBrother named Sabo. In their youth, he was the physical midpoint of the three, and was TheSpock in their three man band. The story is told entirely through flashback, as Sabo is assumed dead and thus a PosthumousCharacter. His death, and Ace's subsequent death,]] To the viewers, this complicates every ''previous'' interaction between Luffy and Ace, their current situation, and [[GallowsHumor all those that would follow]]. Additionally, Ace's tattoo and Luffy and Ace's relationships with their {{nakama}} take new significance. In a cover, it is shown that [[spoiler: had Sabo lived, the three would be together, and to cement this "GoodFuture", Ace's tattoo loses its meaningful misspelling.]]

Consider the trope namers. Many people know the story of CainAndAbel, the first children born in the Abrahamic religions. AsYouKnow, Cain kills Abel, and was banished by God. What less people know, is that AdamAndOrEve had several more kids, only one of whom was named, Seth. Seth would replace Abel as the "good" son, and while both he and Cain would have children (with their unnamed sisters), Cain's lineage would be cursed, and would eventually all be doomed by the Great Flood. Noah and his family were descended from Seth, and as the only survivors of the Flood, this means that all humans are descended from Seth, taking both of their places as the future of humanity.

* In TheVentureBros., [[spoiler: Dermott Fictel is introduced, and almost instantly separates Dean and Hank, as he is more similar to Hank, following the brothers' DivergentCharacterEvolution. He's hinted as being Brock Samson's son, but he is actually Rusty's accidental child, thus making him the third Venture brother, and strangely enough the only brother with a confirmed mother.]]

The two sibling dynamic is tried and true. You could have a RedOniBlueOni situation, or characters that are extreme opposites or slightly but distinctly different.

Then again, RuleOfThree.

In this trope, a third (or later) is introduced specifically in a way to complicate the relationship between established siblings, or between the established siblings and the new sibling. If the characters aren't related by blood, but through the same MetaOrigin consider themselves BloodBrothers or BashBrothers ''literally'', then another character with the same MetaOrigin and honorary sibling status may suffice.

* In ''XMen'', a slip up by Mr. Sinister introduced the trope codifying example. As explained on the TangledFamilyTree page, Scott Summers was introduced as an orphan, then met and established a relationship with his brother Alex. This lasted for quite some time, before Sinister hinted that there was at least one more brother out there. After a lot of plot changes and WordOfGod statements, the brother was set as Vulcan, a supervillain emperor.

In this trope, a third (or later) is introduced specifically in a way to complicate the relationship between established siblings, or between the established siblings and the new sibling.

If the characters aren't related by blood, but through the same MetaOrigin consider themselves BloodBrothers or BashBrothers ''literally'', then another character with the same MetaOrigin and honorary sibling status may suffice.

[[AC: {{Religion}}]]
* Many people know the story of CainAndAbel, the first children born in the Abrahamic religions. AsYouKnow, Cain kills Abel, and was banished by God. What less people know, is that AdamAndOrEve had several more kids, only one of whom was named, Seth. Seth would replace Abel as the "good" son, and while both he and Cain would have children (with their unnamed sisters), Cain's lineage would be cursed, and would eventually all be doomed by the Great Flood. Noah and his family were descended from Seth, and as the only survivors of the Flood, this means that all humans are descended from Seth.

[[redirect:TheOtherBrother]]

[[redirect: TheOtherBrother]]