Ethan Hawke as Nikola Tesla

Eve Hewson as Anne Morgan

Jim Gaffigan as George Westinghouse

Kyle MacLachlan as Thomas Edison

Donnie Keshawarz as J.P. Morgan

Josh Hamilton as Robert Underwood Johnson

Ebon Moss-Bachrach as Anital Szigeti

Lucy Walters as Katherine Johnson

John Palladino as Bourke Cochran

Michael Mastro as Charles Peck

Hannah Gross as Mina Edison

Peter Greene as Nichols

Blake DeLong as William Kemmler

Karl Geary as Francis Upton

James Urbaniak as Professor Anthony

Eli Smith as Roller Skating Fiddler

Dan Bittner as Fred Ott

David Kallaway as John Kruesi

Nicholas Wuehrmann as Ed the Organist

Haley Elise Pehrson as Tesla's Mother

Tony Hutaj as Bill Edison

Corban Elwick-Schermitz as Tom Edison Jr.

Emory Gleeson as Dot Edison

Ian Lithgow as Alfred Brown

Emma Clare O'Connor as Evelyn

Gary Rissman as Man Comforting Dog

Steven Gurewitz as Harold P. Brown

Rick Zahn as Tracy Becker

Lois Smith as The Grande Dame

Tallulah McRae Silovsky as Young Anne Morgan

Hermione Heckrich as Agnes Johnson

Tom Farrell as Warden Durston

Thomas Roma as Prison Doctor

Vincent De Paul as Westinghouse Assistant

Christian Hicks as Waiter

Rebecca Dayan as Sarah Bernhardt

Jameal Ali as Swami Vivekananda

David Weinberg as Fritz Lowenstein

Paul Saltzberg as Alta Vista Waiter

Joshuah Melnick as Richard Gregg

Charles Baran as Alta Vista Concierge

David Kubicka as Alta Vista Violinist

Carl Bernzweig as J.P. Morgan's Assistant

George Aloi as Science Society President (uncredited)

Gary Ayash as Science Society Dignitary (uncredited)

Luna Jokic as Macak

Eli A. Smith as Roller Skating Fiddler