Mike Pratt broke his legs in episode

I had always wondered why in some scenes of the episode "Somebody Just Walked Over My Grave" there was an obvious double of Mike Pratt in the underground tunnel, and in the house with his back to the camera. Mike must have broke his legs during filming as he is seen leaning in the doorway of the mansion house, before his double takes off after the villains.

This is one of my favourite episodes, as is "A Sentimental Journey" which featured the gorgeous Tracy Crisp.