TNG Second Chances
Riker returns to a planet he left and finds himself.
Once again, the story is hurt by the McGuffin (getting the data), because the interest in this is the two Rikers. While there is some fun bits, rather than have Data & Worf speculate as to why the Rikers are having trouble getting along, it'd have been nice to actually have the Rikers deal with it (and not in the yelling at each other when forced to work together to get the McGuffin way).
EDIT:
OH I