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Sibling Rivalry (Family Guy)

"Sibling Rivalry"
Family Guy episode
Episode no. Season 4
Episode 22
Directed by Dan Povenmire
Written by Cherry Chevapravatdumrong
Production code 4ACX24
Original air date March 26, 2006
Guest appearance(s)
Episode chronology
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Family Guy (season 4)
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"Sibling Rivalry" is the 22nd episode of the fourth season of the animated comedy series Family Guy. It originally aired on Fox in the United States on March 26, 2006. The episode follows Stewie as he battles with his half-brother, Bertram (voiced by Wallace Shawn), who is born to two lesbians after Peter donates sperm. Meanwhile, Lois begins excessive eating after Peter undergoes a vasectomy and loses his interest in sex.

The episode was written by Cherry Chevapravatdumrong and directed by Dan Povenmire. The episode received mixed reviews from critics for its storyline and many cultural references. According to Nielsen ratings, it was viewed in 7.95 million homes in its original airing. The episode featured guest performances by Randy Crenshaw, Gavin Dunne, Bob Joyce, John Joyce, Phil LaMarr, Rick Logan, Wallace Shawn, Tara Strong, Nicole Sullivan and Wally Wingert, as well as several recurring voice actors for the series.

After a pregnancy scare, Peter reluctantly agrees to get a vasectomy to prevent further repeats. Before the surgery, he agrees to donate sperm, should he and Lois ever decide to have another baby. While in the sperm bank, Peter accidentally destroys all the existing samples, and decides to replace them with his own to prevent himself from getting into trouble. Nine months later, a lesbian couple, who took away some of Peter's sperm in order to conceive a child, gives birth to Bertram, Stewie's half-brother who first appeared in the episode "Emission Impossible".


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