约翰·本杰明·海基
John Benjamin Hickey
饰：Narrator
Jordan Romano
饰：Howard Hughes,1 episode, 2007,
Mark Fernandes
饰：Paparazzi,1 episode, 2007,
Victoria Fraser
饰：1 episode, 2008
Matt Santoro
饰：Albert DeSalvo,1 episode, 2007, / ...
Keith E. Smith
饰：Howard Hughes' Aide,1 episode, 2007,
T.J. Civis
饰：Commander Francis A. Slattery,1 episode, 2008,
马修·沃克
Matthew Walker
饰：1 episode, 2008
蒂姆·哈尔平
Tim Halpin
饰：Detective,1 episode, 2007, / ...
利兹·安德森
Liz Anderson
饰：Beverly Samans,1 episode, 2007,
帕特里克·迈克尔·斯特兰奇
Patrick Michael Strange
饰：Navy Lieutenant,1 episode, 2008,
Will Rosser
饰：Narrator,1 episode, 2007,
Athan Theoharis
饰：Self - Author of 'The FBI and American Democracy',1 episode, 2007,
Bill Bonanno
饰：Self - Son of Mafia Boss Joseph Bonanno,1 episode, 2007,
Terry G. Reed
饰：Howard Hughes' Surgeon,1 episode, 2007,
Megan McNally
Megan McNally
饰：Jean Peters,1 episode, 2007,
Jo Adell
饰：Victim,1 episode, 2007,
查尔斯·古尔德
Charles Gould
饰：1 episode, 2008
Bob Ballard
饰：Self,1 episode, 2008,
Kirk Lambert
Kirk Lambert
饰：Navy Commander,1 episode, 2008,
Jefferson Smith
饰：Navy Lt. Commander,1 episode, 2008,
Charles Taylor Gould
饰：Commander Harvey,1 episode, 2008,
Doug Hawley
饰：1 episode, 2008
Julie Anchor
饰：Sally Johnson,1 episode, 2008,
Marcus Gogas
饰：Navy Lt. Commander,1 episode, 2008,
David Toothe
饰：Navy Commander,1 episode, 2008,
Mike Coffield
饰：Ted Kaczynski,1 episode, 2008,
Robert Herring
Robert Herring
饰：1 episode, 2008
Mike Morrow
饰：FBI Agent,1 episode, 2008,
Grand Duchess Tatiana
饰：Self - Nicholas II Daughter,1 episode,
Anthony Summers
Anthony Summers
饰：Self - Author of 'The Secret Life of J. Edgar Hoover',1 episode, 2007,
尼古拉斯二世
Tsar Nicholas II
饰：Self - Russia's last tsar,1 episode,
Curt Gentry
Curt Gentry
饰：Self - Author of 'J. Edgar Hoover: The Man and the Secrets',1 episode, 2007,
Judy Cerda
饰：Louisa Stewart,1 episode, 2007,
Tim Brazil
饰：Prison Guard,1 episode, 2007,
Jan-David Soutar
饰：Navy Lieutenant,1 episode, 2008,
Michael Uimari
Michael Uimari
饰：FBI Agent,1 episode, 2008,
Gabriel Vaughn
饰：1 episode, 2008
Warren Watson
饰：Lt. Commander Stanley Hecker,1 episode, 2008,
Monika Gonzalez
饰：1 episode, 2008
George Balulis
饰：Navy Lt. Commander,1 episode, 2008,
Leon Cobb
饰：Civilian Scientist,1 episode, 2008,
Kenny New
饰：FBI Agent,1 episode, 2008,
Maxwell Hessman
饰：1 episode, 2008
Gary Nooger
饰：Navy Commander,1 episode, 2008,
Jessica Lynne Ross
饰：1 episode, 2008
Grand Duchess Olga
饰：Self - Nicholas II Daughter,1 episode,
Tsarina Alexandra
饰：Self - Nicholas II Wife,1 episode,