-Another encounter with the Tholians might be fun.
I thought that was a very intriguing life form. It looked pure evil. That MU episode also had a "return" of the Gorn but the guy was too lizard like and lacked the sheer coolness of the original Gorn captain.
I had to look that up on memory alpha but did not get much.
Is there something like an Yvonne Craig Caitian for me to search for? That would be purrrfect