Theo Marceuse (Korob) as Lescaux on Devil's Island:
Funny thing about this guy. For so long, I'd watch this episode, and I kept thinking I knew him from something else, but couldn't place what it was. Then it recently dawned on me what it was, was his voice...it has a similar sound to Gavin Macleod's!
Until Marcuse's sudden passing, Marcuse (<- proper spelling!) and McLeod were TV's 'go to' guys for evil/eccentric foreign baddies. Unfortunately, unlike Macleod, he never got a chance to rehabilitate his image.