Smithers: Sir, the actors are here to audition for the part of you.
Mr. Burns: Excellent.
Hannibal Lecter: Excellent. [Snarls].
Mr. Burns: Next.
William Shatner: Ex. Cell. Ent.
Mr. Burns: Next.
Homer: Exactly. Heh heh. D'oh!
Mr. Burns: Next.
Bumblebee Man: ¡Excelente!
Señor Spielbergo: Es muy bueno.
Mr. Burns: Oh, it's hopeless. I'll have to play myself.
Jay Sherman: Tonight, we review an aging Charles Bronson in "Death Wish 9."
Charles Bronson: [Bedridden in a hospital.] I wish I was dead.
Answer: I'm not sure if this is the one you're thinking of, but an episode of "Ray Bradbury Theatre," called "A Sound of Thunder," dealt with a similar matter: a group of hunters travel back in time to hunt dinosaurs, only to find things have changed when they get back because someone stepped on a butterfly.
Xofer