Sir Keith

Christopher Benjamin played three larger than life characters. For the Third Doctor he was Sir Keith Gold in Inferno, and for Tom Baker's Fourth Doctor he was Henry Jago the instantly likeable manager of the music hall where Weng Chiang's dastardly plan was being put into action. He returned as the Colonel for the Tenth Doctor story, The Unicorn and The Wasp.

Henry Jago Just Wants to Run a Music Hall

He Never Asked For Monsters In His Cellar.

And he really just wanted a quiet life as the Colonel.