Academy Award Nominee (one Flew Over the Cuckoo's Nest.) Brad Dourif
twice (Thrice? Basics was a two parter.) played the role of Lon Suder on Star Trek Voyager, as well as Brother Edward in the 3rd season episode of Babylon 5, Passing Through Gethsemane
You may know him best as murderous doll Chucky from the Child's Play series of movies.
As far as Star Trek was concerned, he was a big get.