What Are Little Girls Made Of? - S1-E8
Continuity mistake: When the android Kirk boards the Enterprise and takes a "command pack," he walks out and down to the transporter, but he doesn't have the pack in his hand.
What Are Little Girls Made Of? - S1-E8
Continuity mistake: While Kirk's trying to convince Ruk that Korby's creating the same danger just like the Old Ones, when Kirk tells him that humans are full of unpredictable emotions, the closeup of Kirk is a flipped shot (the jumpsuit's blue and green switch sides).
What Are Little Girls Made Of? - S1-E8
Continuity mistake: As Kirk talks to Ruk, a closeup of Kirk shows a few strands of hair down over his left eye. In the regular shot, it's normal.
What Are Little Girls Made Of? - S1-E8
Continuity mistake: As Ruk is being questioned, he's standing in the open door. As Kirk grabs his arm to keep him from leaving, Ruk is suddenly half way in the room without moving.
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.