Full cast of Project Blue Book

Aidan Gillen

Allen Hynek

20 episodes

Michael Malarkey

Michael Quinn

20 episodes

Laura Mennell

Mimi Hynek

20 episodes

Ksenia Solo

Susie Miller

20 episodes

Neal McDonough

James Harding

20 episodes

Michael Harney

Hugh Valentine

20 episodes

Nicholas Holmes

Joel Hynek

12 episodes

Jill Morrison

Faye

11 episodes

Ian Tracey

Fixer / William

10 episodes

Robert John Burke

William Fairchild

7 episodes

Matt O'Leary

Henry Fuller

6 episodes

Jerod Haynes

Daniel Banks

5 episodes

Currie Graham

Cal Miller

5 episodes

Keir O'Donnell

Evan Blake

4 episodes

Michael Imperioli

Edward Rizzuto

3 episodes

Caspar Phillipson

John F. Kennedy

3 episodes

Sofia Milos

Daria

3 episodes

Heather Doerksen

Donna Smith

3 episodes

Zach McGowan

Duncan Booker

2 episodes

Spencer Garrett

Ryan Blackstone

2 episodes

Bob Gunton

Harry S. Truman

1 episode

Thomas Kretschmann

Wernher von Braun

1 episode

Bronson Pinchot

David Dubrovsky

1 episode

Nolan Hupp

Eric

1 episode

Jason Burkart

Greg

1 episode

Christopher Heyerdahl

Edmund

1 episode

Graham Greene

David

1 episode

Rohan Campbell

Rourke

1 episode

Steven Williams

Nate

1 episode

Dave Cameron

Panel Member (uncredited)

1 episode