John Benjamin Hickey
Frank Winter (23 eps)
Olivia Williams
Liza Winter (23 eps)
Ashley Zukerman
Charlie Isaacs (23 eps)
Rachel Brosnahan
Abby Isaacs (23 eps)
Harry Lloyd
Paul Crosley (23 eps)
Katja Herbers
Helen Prins (23 eps)
Michael Chernus
Louis "Fritz" Fedowitz (23 eps)
Christopher Denham
Jim Meeks (23 eps)
Daniel Stern
Glen Babbit (13 eps)
Alexia Fast
Callie Winter (13 eps)
Stafford Douglas
Thatcher (11 eps)
William Petersen
Col. Emmett Darrow (10 eps)
David Harbour
Reed Akley (10 eps)
Jefferson White
Cole 'Iowa' Dunlavey (9 eps)
Lauren Chavez-Myers
Jeannie (9 eps)
Mark Moses
Col. Alden Cox (8 eps)
Carole Weyers
Elodie (8 eps)
Travis Hammer
O'Byrne (8 eps)
Richard Schiff
Occam (8 eps)
Daniel London
J. Robert Oppenheimer (8 eps)
Corey Allen
Theodore Sinclair (6 eps)
Mamie Gummer
Nora (6 eps)
Jason Ralph
Stan (6 eps)
Josh Cooke
Lancefield (5 eps)
Tailinh Agoyo
Paloma (5 eps)
Christina Kirk
Rose Akley (5 eps)
Bill Camp
William Hogarth (5 eps)
Audrey Moore
Francine (5 eps)
Peter Stormare
Lazar (5 eps)
Eddie Shin
Sid Liao (4 eps)
Catherine Haun
Dot (4 eps)
Griffin Dunne
Woodrow Lorentzen (4 eps)
Rebekah Wiggins
Gladys (3 eps)
Nathaniel Augustson
Bruce (3 eps)
Kenneth Miller
Purcell (3 eps)
Matthew Page
Weaver (3 eps)
Paul Blott
Church (3 eps)
Adam Godley
Dr. Adelman (3 eps)
Tad Jones
Major Pellegrin (3 eps)
Ryan Jason Cook
Stanhope (3 eps)
Jonny Coyne
Dr. Alek Barath (3 eps)
Joanne Camp
Oppenheimer's Secretary (3 eps)
Danny Winn
Scientist Brock (3 eps)
Jason Weiler
Scientist #2 / Finney (2 eps)
Shylo Molina
Featured Child (2 eps)
Colin Jones
Wayne (2 eps)
Kent Kirkpatrick
Doctor (2 eps)
Nate Warren
Vidders (2 eps)
Beth Bailey
Fay (2 eps)
John Carroll Lynch
Daniel Ellis (2 eps)
J.B. Tuttle
Ledbetter (2 eps)
Bruce McIntosh
Samaritan (2 eps)
Marc Comstock
Magpie (2 eps)
Fiona Dourif
Jean Tatlock (2 eps)
Neve Campbell
Kitty Oppenheimer (2 eps)
Jessica Osbourne
Constance Faraday (2 eps)
Justin Kirk
Joseph Bucher (2 eps)
Sonia Maslovskaya
Malka (1 eps)
Vic Browder
Deputy (1 eps)
Mona Malec
Secretary (1 eps)
Fran Martone
Akley's Secretary (1 eps)
Kristen Rakes
Wilma (1 eps)
Mark Sivertsen
Staff Sergeant (1 eps)
Debrianna Mansini
Dorothy (1 eps)
Ben Ziegler
Hankins (1 eps)
Vivian Nesbitt
Colonel Cox's Assistant (1 eps)
Sarah Minnich
Vera (1 eps)
John Trejo
Zeller (1 eps)
Christian Clemenson
Niels Bohr (1 eps)
Philip Ettinger
Watts (1 eps)
David Midthunder
Aniceto (1 eps)
Kevin Wiggins
Field Sergeant (1 eps)
Dave Racki
Soldier #1 (1 eps)
Bryan Head
Soldier #2 (1 eps)
Trine Christensen
Nurse (1 eps)
Kyle T. Cowan
Young Frank (1 eps)
Glenn Morshower
Censorship Captain (1 eps)
Tommy Truex
Young Officer (1 eps)
Genia Michaela
Ruth (1 eps)
Katie Anne Mitchell
Ticketing Agent (1 eps)
Joshua Rollins
Tuck (1 eps)
Frank Bond
Tupper (1 eps)
John Gabriel Rodriquez
Travis (1 eps)
Jessica Hecht
Miriam Rubins (1 eps)
Robin Thomas
Maxwell Rubins (1 eps)
Kristin Hansen
Akley's Secretary (1 eps)
Lucia Micarelli
Annie Liao (1 eps)
Jade Scott Lewis
Swee (1 eps)
Raoul Max Trujillo
Javier (1 eps)
Lora Martinez-Cunningham
Ida (1 eps)
Jennifer Allcott
Evelyn (1 eps)
James Lawrence Sicard
Ivan (1 eps)
Gerald McRaney
Sec. Hentry Stimson (1 eps)
Michael O'Neill
Psychiatrist (1 eps)
Tony Devon
Omar (1 eps)
Brad Garrett
Eli Isaacs (1 eps)