Without peeking, name the famous guest star and the espisode they appeared.
I'll get the ball rolling with my own favorite (and of my favorite eps of any show ever).
Phil Silvers (The Producer)
This epsiode taught me more as a kid than any given ep of Sesame Street. At age 8, I not only learned about Hamlet, but the opera Carmen as well. Who woulda thunk it? LOL.