Rich Man, Poor Man
S04E22 Sibling Rivalry
After Peter undergoes a vasectomy, he finds himself with no interest in intimacy. Meanwhile, as Lois starts to put on weight, Peter suddenly takes notice of her again. However, things take a turn when Lois's unhealthy lifestyle leads her to suffer a heart attack. To save her, the surgeon has to remove excess fat to access her heart, bringing her back to her usual weight. In a separate storyline, Stewie's half-brother Bertram makes a comeback, leading to an epic showdown between them for dominance over the playground.
Season 4 Episodes
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North by North Quahog
Fast Times at Buddy Cianci Jr. High
Blind Ambition
Don't Make Me Over
The Cleveland–Loretta Quagmire
Petarded
Brian the Bachelor
8 Simple Rules for Buying My Teenage Daughter
Breaking Out Is Hard to Do
Model Misbehavior
Peter's Got Woods
Perfect Castaway
Jungle Love
PTV
Brian Goes Back to College
The Courtship of Stewie's Father
The Fat Guy Strangler
The Father, the Son, and the Holy Fonz
Brian Sings and Swings
Patriot Games
I Take Thee Quagmire
Sibling Rivalry
Deep Throats
Peterotica
You May Now Kiss the... Uh... Guy Who Receives
Petergeist
The Griffin Family History
Stewie B. Goode
Bango Was His Name Oh!
Stu & Stewie's Excellent Adventure