Professor Roland Breeze

Captain Phillips

Giles Grey (1 episode)

Prime Minister

Cmdr. Fortune

Commander Robertson

Uncle Quentin

Uncle Quentin (2 episodes)

Prime Minister (1 episode)

Captain Phillips (1 episode)

Professor Roland Breeze (1 episode)

Uncle Quentin

Paul

Comdr. Ashurst, R.N.

Ralph Cornish (7 episodes)

Rago (5 episodes)

Dr. Mitchel

(590 episodes)

Abelson

Mr. Clarke

Gustave