Frigging great.
Superb acting from all of them, but especially Harry Andrews. During the last sequence in the cell, the one facial expression where you literally see his world falling apart and from when on he starts rather talking to himself than to others had been worth an award. Ian Hendry should be given due credit either. He delivers his character perfectly. Stunning performance.
Also liked the fact that there's apparently no music at all, so actors and camera could carry the whole thing alone as well as i focus on them. Sound work impressed me either.
Would be great to have some more details on this production, but apparently there's little on the web. A real gem anyway.