ST:TNG, Descent (Parts 1 and 2), Episodes 626 and 701

Interesting as a season finale. I generally enjoy the episodes with Data and Lore. The characterizations Brent Spiner does between the two characters is fun, if a little... heavy handed. Considerably so in Data's emotion'd state, as though he's only supposed to be experiencing anger and hatred as a result of Lore's mechanism, he seems to emote almost as much as Lore himself.

In terms of quality of episode... well, I fell asleep towards the end of the first one. I did like that the Enterprise's C-squad managed to activate the metaphasic shield technology brought up in previous episodes, as well as kill a Borg ship by poking at a sun.

Also, Geordi has his brain systematically replaced by nanomachines throughout the episodes, potentially causing brain damage or death. Picard and Troi? Get to chill in a comfortable Borg prison cell.