Bernard Behrens

as Gabriel Blake

as New Pathologist (1 episode)

as Fred Spreewell (2 episodes)

as Atty. Gen. Smith

as Monsieur Farrin

as Mayor Claire

as Julian Byng

as Milton Lewis

as Dr. Vernon Stark

as Hal

as Gosling

as Reverend Dr. Lionel Jones

as Judge Gaffney

as (voice)

as Giles Corey

as Henry Sprague

as Asst. Secretary of War John J. McCloy (2 episodes)

as Dr. Jerry

as Doc Milgrom

as Judge Greeves

as Dr Placebo

as Prof. Savage (1 episode)

as Angus MacLean