Gerald Hiken

as Leo Szilard

as John

as Dr. Austin

as Erdheim (3 episodes)

as Dr. Vincent Redding (1 episode)

as (segment "A Message From Charity") (1 episode)

as Reb Shulem

as Theo Grant

as Robin Baskins (3 episodes)

as Dimitri Alexandroff (1 episode)

as Morris Getz (1 episode)

as Dennis (2 episodes)

as Fischel Shpunt

as Dr. Lorber