Geoffrey Rush
Albert Einstein (10 eps)
Johnny Flynn
Albert Einstein (10 eps)
Саманта Колли
Mileva Marić (10 eps)
Emily Watson
Elsa Einstein (10 eps)
Ralph Brown
Max Planck (10 eps)
Richard Topol
Fritz Haber (10 eps)
Michael McElhatton
Philipp Lenard (10 eps)
Jon Fletcher
Marcel Grossmann (5 eps)
Seth Gabel
Michele Besso (5 eps)
Catherine McCormack
Marija Ruzic-Marić (4 eps)
Claire Rushbrook
Pauline Einstein (4 eps)
Sally Dexter
Mileva Marić (4 eps)
Helen Monks
Maja Einstein (3 eps)
Alistair Petrie
Heinrich Weber (3 eps)
Shannon Tarbet
Marie Winteler (3 eps)
Nicholas Rowe
Jost Winteler (3 eps)
Predrag Bjelac
Milos Marić (3 eps)
George Webster
Julius Winteler (3 eps)
Lucy Russell
Frau Pauline Winteler (3 eps)
Gwendolyn Ellis
Elsa Einstein (3 eps)
Lily Dodsworth-Evans
Ilse Löwenthal (3 eps)
Henry Goodman
Walther Rathenau (3 eps)
T.R. Knight
J. Edgar Hoover (3 eps)
David Dencik
Niels Bohr (3 eps)
Taylor Frost
Paul Winteler (2 eps)
Joshua Hogan
Mathias Winteler (2 eps)
Lucy Chappell
Rosa Winteler (2 eps)
Benjamin Haigh
Fred Winteler (2 eps)
Robert Lindsay
Hermann Einstein (2 eps)
Tim Dutton
Headmaster Loncar (2 eps)
Klára Issová
Marie Curie (2 eps)
Gregory Gudgeon
Professor Minkowski (2 eps)
Zoe Telford
Clara Haber (2 eps)
Silvina Buchbauer
Katharina Lenard (2 eps)
Edan Hayhurst
Hans Albert Einstein (2 eps)
Eugene Simon
Eduard Einstein (2 eps)
Charity Wakefield
Betty (2 eps)
Vincent Kartheiser
Raymond Geist (2 eps)
Thomas Morris
Ernst (2 eps)
Dag Malmberg
Svante Arrhenius (2 eps)
Jolyon Coy
Max Laue (2 eps)
Téby Zita
Older Ilse Einstein (2 eps)
Jodhi May
Helen Dukas (2 eps)
Nikola Đuričko
Leo Szilard (2 eps)
Joshua Akehurst
Hans Albert Einstein (2 eps)
Nancy Crane
Eleanor Roosevelt (2 eps)
Simon Kunz
Friedrich Haller (2 eps)
George Lenz
Captain Muller (1 eps)
Martin Umbach
Dr. Talmut (1 eps)
Nikki Hahn
Mileva Marić (1 eps)
Michael Culkin
Professor Pernet (1 eps)
Isaac Rouse
Emile (1 eps)
Alexander Vlahos
Maurice Solovine (1 eps)
Tom Brittney
Conrad Habicht (1 eps)
Adrian Lukis
Wilhelm Röntgen (1 eps)
Lynsey Beauchamp
Anna Röntgen (1 eps)
Emily Laing
Helene Savic (1 eps)
Terrence Hardiman
Professor Griesel (1 eps)
Thomas Padden
Walther Nernst (1 eps)
Sue Maund
Frau Schnellham (1 eps)
Peter Hamilton Dyer
Frederic Ebersold (1 eps)
Corrado Invernizzi
Pierre Curie (1 eps)
Rod Hallett
Carl Jung (1 eps)
Nick Sampson
Professor Kleiner (1 eps)
Timothy Radford
Hans Albert Einstein (1 eps)
Peter Bramhill
Arnold Sommerfeld (1 eps)
Lisa Ray-Jacobs
Berta Fantova (1 eps)
Luke Allen-Gale
Erwin Freundlich (1 eps)
Radivoje Bukvić
Vladimir Varicak (1 eps)
Katharina Sporrer
Kate Hirschberg (1 eps)
Charleigh Bailey
Bertha Krupp (1 eps)
Nick Waring
Gustav Krupp (1 eps)
Johannes Franke
Tobias (1 eps)
Lochlann O'Mearáin
Georg Nikolai (1 eps)
Adrian Edmondson
David Hilbert (1 eps)
Jack Fox
Paul Weyland (1 eps)
Edward Harrison
Arthur Eddington (1 eps)
Hugh Robb
Eduard Einstein (1 eps)
Eric Carte
Sir William Crookes (1 eps)
Peter Jacobson
Chaim Weizmann (1 eps)
Amy Huck
Eleanor (1 eps)
Adam Garcia
Moe Berg (1 eps)
Christian Rubeck
Werner Heisenberg (1 eps)
Ania Bukstein
Margarita Konenkova (1 eps)
Rob LaBelle
Henry Morgenthau (1 eps)
John Sackville
R. Davis Halliwell (1 eps)
Karel Dobrý
Mikhail Ivanushkin (1 eps)
Stephen Chance
Paul Scherrer (1 eps)
Mitchell Mullen
Franklin Roosevelt (1 eps)
Georg Nikoloff
Sergei Konenkov (1 eps)
Miles Richardson
Vannever Bush (1 eps)
Dixie Egerickx
Alice Edwards (1 eps)
Ed Stoppard
Hans Albert Einstein (1 eps)
Neal Huff
Robert Oppenheimer (1 eps)
Aidan McArdle
Thomas Harvey (1 eps)
Jasmin von der Born
Freida Einstein (1 eps)
Joshua Glenister
Bernhard Einstein (1 eps)
Bethany Adams
Flexner's Secretary (1 eps)
Issy Stewart
Female Agent #1 (1 eps)
Eric Colvin
Jakob Einstein (1 eps)
Richard Walsh
Minister (1 eps)