Saul Cohen
Khonshu (voice) (1 episode)
Oyun
Prophet
Marcus / Marco
Mentor
Judge John Sirica (2 episodes)
Bert Di Grasso (7 episodes)
Dr. Carl Winters (1 episode)
Dr. Longbow
Khonshu (voice) (6 episodes)
Floyd DeBeers
C.W. Longbottom (20 episodes)
Narrator (voice) (4 episodes)
Frank Sams (4 episodes)
Chairman (1 episode)
Grimmel (voice)
Narrator
Cardinal
Burl Preston (1 episode)
Jupiter (voice)
Ayatollah (1 episode)
Himself - Narrator (3 episodes)
Information (voice)
Norman Wallach
Mr. Moustafa
The Margrave
Bud Grossman
Daniel Gottlieb (1 episode)
Gregor
Dar Adal (39 episodes)
Marco D'Aviano
John Henry Newman
Leon Goodwin (1 episode)
Narrator
Burl Preston (4 episodes)
Theodore Nichols (1 episode)
Siniscalco Barozzi
Matthew (1 episode)
Professor Gross
Professor Bill Girdler
Goran
Grandfather Wahid
Professor Hamilton
Ruggero
Nathan
Narrator (voice) (25 episodes)
Pantaley
Narrator (1 episode)
Viceroy of Peru
Paul Minsky
Readings (Voice) (4 episodes)
Entita
Airport Guru
Airport Guru (1 episode)
Father Tardone
Delfinello da Coverzano
Robert Crawford
Bruno Rubin
Tommaso Buscetta
Mordechai
Professor Henry Covington
Ad'har Ru'afo
Belisario
Jim Sullivan
Dr. Gates
President Mendoza
Josef 'Uncle Joe' Stalin
Caleb Cobb (3 episodes)
Al Capone
Chorleiter
Al Capone
Scalinger
Chess Hustler
Wolfe, Sr.
Lucien Haslans
Older Seit
Zargo
Professor Harlech
John Practice
Harold Leacher
Narrator
Stalin
Kharoun
Arnold Rothstein
Will Scarlet
D.A. Abe Weiss (uncredited)
Osrain
Narrator (voice)
Capt. Ramon Garcia
Papa Giulio II
Jack Narwhal
Professor Leopold Nettles
l'Innominato (5 episodes)
Virgil Cane
Abdul Hamid
Cornelius
Dr. Harry Bertram - the Whale Man
Self - Host
Self - Narrator (voice) (1 episode)
Father Carafa
Bernardo Gui
President Abraham Lincoln (3 episodes)
Antonio Salieri
Omar
Eppis
Marco Cohen
Duke Skaggs
Bobby Carr (1 episode)
Chris
Arresting Officer #1
Mechanic
Solly Nurse (2 episodes)
Eddie Gordon (1 episode)
Taxi Driver
Detective Partner (uncredited)
Clyde (the usher)