Forum:Looking for a claw

I need help to find out what episode of Doctor Who is still n my mind since I was a little child. This is about an episode on TV in the early 1970s in Holland. The episode was about a lord who covered his right(?) hand because it was actually a killing claw with a mind of its own. If this rings a bell for someone, I would very much appreceate to learn what episode this was so I can get my mind at rest.