Peter Pratt

Peter Pratt (21 March 1923-11 January 1995) was the second actor to portray the Master on Doctor Who. His portrayal of an emaciated Master at the end of his regenerative cycle introduced a new element in the ongoing battle between the Doctor and this most dangerous of renegade Time Lords.

Pratt was best known for his work performing operettas by Gilbert and Sullivan with the D'Oyly Carte Opera Company.

Doctor Who Episodes
The Master - The Deadly Assassin, Logopolis (archive footage)