Steed initially describes his assailant as big & weighing about 16 stone but later, in the pub, when he is talking to Mrs Gale, he says 17 stone.
When Miller is finishing the cup, the camera pans with him towards a table and loudly bumps into it, making the screen wobble and shake for a moment.
When De Groot offers Mrs Gale a cupcake in the pub, the actor (Steve Plytas) forgets his next line and audibly swears under his breath. Honor Blackman saves the situation with an ad lib.