I had a friend who used to say "For the greater good" to describe why he refrained from dating; he had anger issues and bipolar. And one of the characters he designed for a role playing game had the exact same armor suit getup as Lore; black with black armor plates.
Imagine his near schizophrenic freak out reaction when he saw this episode. Well, he actually didn't freak out, but furled his brow and uttered "what the heck?" Oh well.
Lore, Data's evil twin brother, gets wrapped up in some sort of political dogma and acts out. Data puts him in his place, and things go on from there, as they say in the US Navy's psyche ward.
Lore allegedly has issues with his design and programming, and after being dealt with somehow keeps coming back ... like all good arch-nemesis.
I'm not sure what happened to my friend, his character sheet, and his "for the greater good" utterances, but this episode really made him scratch his head. Me, I shrugged at it. It was another non-action episode that relied on a lot of talking to address lore with some action hijinks from Data.
It was a bit more watchable than other episodes, but still hokey--my friend and his personal experience not withstanding.
To be honest Lore feels a bit contrived, wasn't used often enough, added some menace to the show without the writers falling back on another Holodeck catastrophe, but felt like a stock villain to me. I can't say why, it just felt like it; i.e. The opposite of the brother who is all good.
It was interesting for what it was, but again the episode was marred by the slow story format that relied on a lot of dialogue. Still, it was interesting. Check it out and see what you think.