Q-Less (Episode 7)

Picard’s messy frenemies—the unscrupulous archaeologist Vash and the omnipotent annoyance Q—come to make deals and cause chaos on Deep Space Nine, which finds itself mysteriously afflicted with power losses.
The “mystery” of the episode isn’t all that great, but what really works here is Sisko just having zero time for Q’s bullshit. Another quick, succinct display that this new Star Trek leader is not just a second Captain Picard or Kirk. And that he’s got a pretty mean jab.