Plot hole: Illya dives into the pool to rescue Solo and Lavinia, who've been tied to mattresses and left to drown. Somehow, Illya divines that Solo will be able to free himself. He swims to Lavinia and cuts her free while Solo is still sinking, then heads for the ladder without looking back. Fortunately, his psychic powers are on target: an untied Solo soon appears, swimming free, behind him. (00:38:10)Jean G
Plot hole: Mr. Varner spots Illya down the street and says, "I think he's another U.N.C.L.E. agent." His uncertainty is odd: he helped identify and chase Illya earlier in the episode, so he already knew to be fact what he only "thinks" in this later scene. (00:38:35)Jean G
Continuity mistake: In the stairwell, Illya shoots the second Thrush gunman one time. When the man starts to fall, there are no holes or marks at all on his white jacket. A few seconds later, as he finishes falling down the stairs, three bullet holes suddenly appear in his coat, even though Illya only shot him once. (00:42:00)Jean G
Other mistake: In the last scene of the episode, the opening shot is a Boeing 707 in flight. The 707 logo on the tail is backwards. It appears they flipped over a piece of film stock from a shot earlier in the episode, where the same plane was flying in the opposite direction.
Factual error: Mandy reveals at the end that she's been carrying the microdot hidden inside her contact lens. Ouch. Any foreign object placed inside a contact, especially the hard glass contacts of the 60s, would cause irritation severe enough to make the lens unwearable and the eye very, very red. (00:44:15)Jean G
Revealing mistake: When Napoleon Solo arrives at the train station, both the name of the newspaper the man in black is holding, and the name on the station sign are backwards. Additionally, as he arrives by train the man in black is on the left side of the shot. After exiting the train, the man in black appears from the right side of the shot. (00:12:35)Skip Lawson
Continuity mistake: As Napoleon Solo arrives by train, he passes two donkey drawn carts and approaches a woman whose sweater collar is overlapped from right to left. In the next shot, showing Solo exit the train, the donkey carts are now to the right and the woman's collar is now overlapped left to right. (00:12:35)Skip Lawson
Other mistake: Vladik, incorrectly, tells Donfield on the phone to stand at the hot dog stand at 3 pm Monday. It should have been 11 am. Donfield in the "meet" scene refers to his 11 o'clock feeding" and Mr. Smith tells Solo (Donfield) his next meeting is between one and two pm. This would be impossible if the original meet was at 3 pm.