- Raymond Burr as the defense consul for Kirk in "Court-Martial"
- Alan Hale Jr. as an admiral. "Kirrrrrrrkk!". Or more fittingly as a friendly, bumbling schemer, somewhere between Mudd and Stanley Jones' character
- Fred Gwynne, John Astin, Jackie Coogan, Robert Stack, Dan Blocker, Jack Elam, Burgess Meredith as a villain, Bruce Gordon (mighta made a better mobster in "A Piece of the Action"), Lois Nettleton, Neil Hamilton (he appeared in Outer Limits and did a nice job there), Victor Buono, Telly Savalas, Julie Newmar (she was at the height of her beauty in the '60s).
- George Maharis (Buz from Route 66). He could show Shatner how's it done, giving an impassioned speech upstaging Kirk while Kirk chews the scenery.
- The Fish Man from the Creature from the Black Lagoon. It could be an aquatic Arena for Kirk and the Fish Man. Throw in Helen Noel swimming around that waterworld too. Or how about a real battle... Helen Noel vs. Julie Newmar playing some kind of alien to 'free' Kirk from his 'imprisonment' on a planet full of beautiful women. I believe the viewer response would be
And I would have liked more Marianna Hill and a Season 3 appearance for Harry Mudd.
- Alan Hale Jr. as an admiral. "Kirrrrrrrkk!". Or more fittingly as a friendly, bumbling schemer, somewhere between Mudd and Stanley Jones' character
- Fred Gwynne, John Astin, Jackie Coogan, Robert Stack, Dan Blocker, Jack Elam, Burgess Meredith as a villain, Bruce Gordon (mighta made a better mobster in "A Piece of the Action"), Lois Nettleton, Neil Hamilton (he appeared in Outer Limits and did a nice job there), Victor Buono, Telly Savalas, Julie Newmar (she was at the height of her beauty in the '60s).
- George Maharis (Buz from Route 66). He could show Shatner how's it done, giving an impassioned speech upstaging Kirk while Kirk chews the scenery.
- The Fish Man from the Creature from the Black Lagoon. It could be an aquatic Arena for Kirk and the Fish Man. Throw in Helen Noel swimming around that waterworld too. Or how about a real battle... Helen Noel vs. Julie Newmar playing some kind of alien to 'free' Kirk from his 'imprisonment' on a planet full of beautiful women. I believe the viewer response would be

And I would have liked more Marianna Hill and a Season 3 appearance for Harry Mudd.