I remember seeing Kavi Raz, a secondary actor on NBC's "St. Elsewhere" later play an Engineering Officer on a very early episode of ST:TNG.
I believe he was helping Wesley Crusher with a science project. Surprisingly, the Engineering Officer didn't die by the end of the episode.
Jack.
We recently borrowed the boxed sets of Babylon 5. During one very serious episode we nearly died laughing when Brian Krantz, the actor who played Hal from "Malcom in the Middle," did a guest shot as a Whitestar ship captain. He died a hero but the juxtaposition between characters was an absolute riot.
"...Surprisingly, the Engineering Officer didn't die by the end of the episode..."
Was he one of "the red shirts"?