Trivia: The costume of the Salt Vampire from "The Man Trap" appears in Trelane's castle. It is in an alcove near the front door.
Trivia: William Campbell later appeared as Klingon captain Koloth in "The Trouble With Tribbles."
Trivia: Interestingly, Trelane put Kirk on trial in his courtroom. In Star Trek: The Next Generation S1 : Ep1 "Encounter at Farpoint", Q played judge in an apocalyptic courtroom, putting Picard and the human race on trial.
Answer: Kirk was getting his physical and Dr. McCoy probably turned off communications, because if he hadn't, Kirk would have left and headed straight for the bridge, leaving McCoy irritated.