DS9 s2e11 “Rivals”
O'Brien is a RIVAL with Bashir in the episode, and Quark has a RIVAL in Chris Sarandon! And WHAT ELSE happens?? There's some little luck machines. Odo wanders around in the back of some shots. Kira trips (offscreen). Don't bother buckling up for this one, crew. [Episode discussion begins around 1:26ish]