By the way, check out "The Controllers." Not only does its guest cast include Alfred Ryder from "The Man Trap" and Robert Ellenstein from The Voyage Home, but in a slightly interesting coincidence, there are two young prisoners played by performers who would both go on to play engineers in very early TNG episodes: Brooke Bundy (McDougall) from "The Naked Now" and Stanley Kamel (Kosinski) from "Where No One Has Gone Before."