When George meets with Jackie at 2:30 a.m., you can see that Jackie's watch says 5:00.
After the first time Jackie talks to his reflection he lies down on the bed. The overhead shot of the room shows no gun on the bedside table. When the shot returns to the regular view it is back on top of the magazine.
At the end of the episode, when Jackie opens the door to leave the hotel room, you can see there is a mirror right in front of his room, where there is no reflection of him when he leaves.
The episode is set in New York City. George tells Jackie to go to a bar on 38 Street, between Lexington and Sixth. Lexington Ave is on the East side, while Sixth Ave is on the West side. There are three avenues between Lexington and Sixth.
The main character's reflection in a mirror has come to life and much of the episode is a confrontation between the character and his reflection - although they made an effort to reverse the image (the reflection wears his watch on the opposite hand and he bites his fingernails with the opposite hand) they forgot to reverse the buttons on his shirt.