Continuity mistake: Part of Admiral Nelson's torn uniform changes position on his shoulder as he is being checked out in sick bay.
The Wax Men - S3-E24
Revealing mistake: The heavy metal ring securing the hatch that leads from the flying sub to the Seaview control room bounces up and down as Crane enters the control room.
The Wax Men - S3-E24
Revealing mistake: The explosive squib is visible under the uniform of the wax Chip Morton right before Captain Crane shoots him.
The Wax Men - S3-E24
Continuity mistake: When Captain Crane is shooting the wax crew members, his pistol runs out of ammo, locking the slide open. The next shot shows Crane still shooting without reloading a new magazine.
The Wax Men - S3-E24
Visible crew/equipment: When the clown enters Admiral Nelson's quarters, on the left side of the scene the arm of an extra or set crew can be seen.