Which TOS episode had the best guest cast (with at least 4 notable guest roles).............. Well, I guess i should have made 10 choices but a lot of episodes had 1 or 2 main guest stars and then it got thin after that. I was looking for parts that were both notable and perhaps added to the Trek mythos. I have seen discussions where it came down to Khan or Decker or Romulan Commander as being the best guest, but I wanted to see how people felt about episodes that had something of an ensemble guest cast. I'll vote later because I think it cheesy to start a poll and vote first. Uh duh---I left Paul Fix off the WNMHGB list!