Family Guy Season 4 Episode 22
Sibling Rivalry
Peter gets a vasectomy and loses all his sex drive. Lois begins to gain weight, and as a result, Peter's regains his interest in his wife. When Lois' habits get out of control, she has a heart attack. The surgeon must remove Lois' fat to reach her heart, returning her to her normal weight. Meanwhile, Stewie's half-brother Bertram returns to confront him, where they have a war for control over the playground.
Guest Stars
Wallace Shawn
Bertram (voice)
Wally Wingert
Principal Sloan (voice)
Tara Strong
Little Baby Girl (voice)
Nicole Sullivan
Nurse at Sperm Bank (voice)
Phil LaMarr
Morgan Freeman (voice)