When Rushton first arrives the two strands of his tie are approximately the same length. When the scene continues into the office, the wide part of the tie is now shorter indicating that the tie was retied between the filming of the two takes.
Emma parks her car at the Rushtons and searches through the papers in Rushtons car ahead. The cars are in a tree lined avenue. She is then attacked from behind by Schaffers henchmen. The cars are then shown in a completely different location as she is taken away.
When Emma first speaks to Steed in the tank it is filmed from behind the tank towards her. When filmed from her position, it is in a different position on the desk It has moved again when she positions the rope to be cut.
Chivvers claims that the miniaturized tank is a perfect replica of the original full size version. However, the original tank has grooves visible on the track arches which are not seen on the miniature version.
Mrs. Peel hides under Rushton's desk, which has an open front facing the door. When Susan enters, she doesn't see her even though she's in direct view.
When Steed launches an attack with the oversized pen, his attack begins from the base of the door jamb. However, the man being attacked is nowhere near a door from which Steed could have attacked.
When Mrs. Peel complains she can barely hear the miniaturized Steed in the phone, it's probably because he speaks toward the camera rather than into the phone's microphone.
When Emma Peel is tied up in the Russian's office, there is so much slack in the ropes that she could have easily slipped her legs through and untied herself.