Continuity mistake: In Waverly's office at the beginning, the contemplative Illya's hand is draped over his glasses salute-fashion in wide shot. But in close-up, it's suddenly curled into a fist at the side of his head. Next shot, he's "saluting" again. (00:06:50)
Continuity mistake: In Waverly's office, Illya hones his combat skills by swinging at a suspended wooden block with a baseball bat. When the alarm goes off, Illya puts the bat down on the table, and he and Solo rush to the computer console. In the next, reverse angle shot, the block is still hanging from the ceiling, but the baseball bat has vanished from the table.
Continuity mistake: At the end, Solo & Illya land the helicopter on top of the furniture van. But after the shot of them in the cockpit bumping to a landing, a wide shot shows the copter still hovering in the air above the van. Cut back to them in the cockpit and they're landed again; back to the wide shot, still in the air. (00:44:35)
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)
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)