Plot (Spoiler)

When Stewie gets sent to see his school’s child psychologist Dr. Cecil Pritchfield (voiced by Ian McKellen) for a surprising session, he reveals major secrets about himself that would make him more normal. Stewie soon realizes that his secrets might come out, and decides not to help Dr. Pritchfield when he suffers a heart attack, choosing not to bring him his medication and letting him die, although he feels haunted by his decision as he falls asleep that night.