The director filmed a different scene than the one that was in the script. Robin Hughes, as the prisoner, was supposed to make a wild escape from the castle and the camera was supposed to catch a glimpse of a cloven hoof jumping over the wall. That was to suggest the prisoner was the Devil himself. There was some argument about it, and they spent considerable time making the Devil more traditional than myth. But the film turned out nicely and few people suspect the difference.
That’s the recollection of actor H.M. Wynant, who played the weary traveller, David Ellington, in my favourite Twilight Zone episode “The Howling Man“, which first aired 54 years ago today.