Data and Lore try to take over the world. Oh, wait... that was Pinky and the Brain. I meant the Federation. Luckily, instead of taking any of the redshirts hunting for them prisoner, they take Picard, Geordi, and Deanna prisoner, so of course their captives immediately find a way to reboot Data's ethical program and have him fight Lore's control. Data kills Lore and gets his emotion chip back, which he puts in Geordi's care for the forseeable future.
-Data and Lore, as Data kills his brother