DS9 s2e22 “The Wire”

A tour de force from recurring character Garak in bizarrely play-like long scenes hooks Andy and Matt, as Mr. Fasc-tastic (Mr. Fascistastic? Mr. Fascistic?) Odo checks the cameras he's hidden all around DS9.
[Episode discussion begins around 58:00, takes a Letterman detour, then actually begins at 1:06ish]