Clark and the brother of Henry F. Clark and Ray (Jean) Clark. John was predeceased by his son ... at Iowa State University, earning his Doctor of Veterinary Medicine (DVM) in 1958.

How did you come to be cast in "Doctor Who"? As a massive Whovian, I have always loved the show so much. I bumped into Russell at the Attitude Awards a few years previous, and I was too nervous to ...