Oh Brother, Where Art Thou?

Season 2, Episode 28

Grampa suffers a heart attack while complaining about a bad McBain movie, and, worried that he may be dying soon, tells Homer that he has an illegitimate half-brother named Herb Powell, who turns out to be a rich, yet struggling car company owner in need of a million-dollar idea, but can Herb really count on the idiot half-brother whom he's never met?