Episode Title: "Christopher" (Season 4, Episode 3)
Though Michael Imperioli did write this episode, the "Christopher" in the title refers to Christopher Columbus. The episode is a strange foray into politics and cultural heritage that takes place against the the backdrop of a Columbus Day Parade, which is being protested by local Native Americans.
Considering all the flack the show took for its representations of Italian-Americans, it makes sense that the writers would want to address these criticisms through heritage-sensitive storylines. But the end result doesn't live up to intentions; it's unpolished and sticks out as an episode in which most of the characters seem out of character, particularly Silvio Dante, who—for one episode—becomes politicized. But all that ends at the stroke of midnight the very same evening.
It was probably for the best.