One dead crewman and two missing others prompt Kirk, Spock and Bones to visit planet Pyris VII.
This is a 'so bad it's good' episode, but unfortunately it does not entertain that much outside of some decent lines from certain characters.
The plot is a mish-mash of ideas from other episodes, with a 'spooky' Halloween-like theme, used to explore aspects of humanity such as consciousness, fear, and other sensations. It does not work for me as sci-fi, drama, philosophy or anything other than a way to enjoy watching the characters interact in silly situations.
Sylvia, Kirk, Spock, Bones, Chekhov and LaSalle have moments where they are moderately amusing, but nothing particularly memorable. Some of Spock's dry delivery is as good as ever, LaSalle's command moments are solid and Sylvia's general persona is quite watchable. Antoinette Bower is easily the standout performer and displays some decent charisma. Most other cast members are solid, but James Doohan and George Takei might as well not be there.
It feels harsh to criticise the visuals because they are so fun and provide a lot of the enjoyment I took from the episode, but there is no denying how bad the giant cat and string puppets are. The fight scenes are pretty badly edited and choreographed, particularly Kirk's disarming of Scotty and Sulu's martial arts. The less said about Chekhov's wig the better!