5x123 - Late Show with David Letterman

Tom Hanks interrupts the monologue because he and Dave are dressed alike; throughout the night, spelling bee champ Edmund Gillette stands next to Rob's desk and spells words; during Mailbag, Alan Kalter reacts badly to a letter asking if he's a freak by visiting the letter-writer (Jay Johnson) and punching in his face; Tom gets a new suit.