The following letter, from Mad Dog scriptwriter Don Shaw to Lynne Sweetman is dated February 1 1998. Its contents are reproduced here with many thanks to them both — and the Survivors Newsletter.

Thank you for your letter. I wish you all the very best in your expedition up here. As I remember Mad Dog was shot in very cold weather. Morris Perry, the actor who played the rabid man, was dragged by horse through snow a number of times before the director was happy with it.* Poor old Morris had to be thawed out! But he didn't complain. As he said: "I am an actor and I have to do what the role requires."
I last saw him at Stratford, at the RSC, playing in [the] Merchant of Venice three years ago. My daughter Jane, I believe, was in this episode playing a dirty nosed little girl who stumbled across Dennis Lill inside a barn as he was fleeing from his hunters. My daughter is now a production runner on the filming of The Brokers Man starring Kevin Whately.
I can't remember Ian McCulloch ever being specially designated for Dennis' part. It may have been the case, I can't remember. I do remember telling the producer Terry Dudley that Dennis was a very good actor and should be incorporated into Survivors. So, in this instance, Ian may be correct. Remember, however, that writers had no casting powers as such. That was the preserve of the producer and director.
Meanwhile, may I send my best wishes for your trip into my county. I only remember two locations for Mad Dog — the viaduct over Monsal Dale to the NW of Bakewell, and a spot near Ilam village near Ashbourne (the latter was where Morris Perry was dragged by a horse and where he went mad). The former opened the episode I think with a high shot of a horseman far below to the right approaching the viaduct.
Best wishes to you all!
Sincerely
Don Shaw
* In fact, Morris Perry (Fenton) is bound and dragged through the snow, outside the 'half-way house', not by a horse but by fellow actor Dennis Lill (Charles).
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