I'll vote for Disaster. It's an episode I love for its fish-out-of-water scenarios, but it's not as strong as the other bunch.
Q Who? - 0
The Measure of a Man - 0
Deja Q - 0
The Defector - 0
The Drumhead - 0
Disaster - 3
Tapestry - 0
Chain of Command II - 0
Pre-Emptive Strike - 1
Q Who? - 0
The Measure of a Man - 0
Deja Q - 0
The Defector - 0
The Drumhead - 0
Disaster - 3
Tapestry - 0
Chain of Command II - 0
Pre-Emptive Strike - 1