Olaf Pooley

Olaf Pooley (born 13 March 1914 ) played Professor Eric Stahlman and Director Stahlmann in the Doctor Who story Inferno.

He is now aged 99, and retired.

He had a role in  in 2000, making him one of the very few actors to appear in both Doctor Who and Star Trek.

He is the oldest living male Doctor Who actor. Only Zohra Sehgal is older.