Olaf Pooley

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

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

As of 2012, he is the second-oldest living Doctor Who actor (only Zohra Sehgal is older.)