Past Prologue is quite good. I especially like the first meeting between Garak and Bashir. Is it just me or does Garak break the fourth wall and look directly at the camera and give a sly smile? At any rate it's a great introduction to a great character.
I can't believe how bad Odo's make-up looks in A Man Alone. You would think that being a major character that his make-up would be well refined before he was ever put in front of a camera.
Babel is the generic disease plot that it seems to be a rite of passage for every sci fi television series. It's OK but far from great. Odo and Quark make it watchable.