1. Michael Ansara appeared on Babylon 5 as Elric, a technomage. 2. John Colicos played the devious and evil Dr. Gaius Baltar on the original Battlestar Galactica. 3. William Campbell played Trelane, a Liberace type flamboyant super-being on TOS. The episode was The Squire of Gothos. He also played Captain Koloth on TOS and DS9. Of course by the time he was on DS9 he was anointed Dahar Master Koloth. I had to do some research, but how was that?