Peter Appleton
Elvin Clyde
Ernie Cole
Congressman Doyle
Adele Stanton
Harry Trimble
Sheriff Cecil Coleman
Kevin Bannerman
Emmett Smith
Doc Stanton
Stan Keller
Irene Terwilliger
Mabel
Carl Leffert / Head of the Studio
Bob Leffert
Avery Wyatt
Sandra Sinclair
Leo Kubelsky
Federal Agent Ellerby
Federal Agent Saunders
Jerry the Bartender
Subpoena Server
Daley
Louise
Coastal Engineer
Nurse Muriel
Vera
Grauman's Usher
Grauman's Bon-Bon Girl
Joey
Boy on Beach
Reverend
Western Union Man
Newsreel Announcer (voice)
Roland the Intrepid Explorer
The Evil But Handsome Prince Khalid
Kindly Old Professor Meredith
Studio Executive (voice)
Luke Trimble (voice)
Spencer Wyatt
Principal Swing Dancer (uncredited)
Studio Guard (uncredited)
Dancer (uncredited)
Self (Hollywood Ten, arrives, behind Cole) (archive footage) (uncredited)
Self (Hollywood Ten, arrives) (archive footage) (uncredited)
Carl's Date (uncredited)
Casanova (uncredited)
Photographer (uncredited)
Popcorn Girl (uncredited)
Swing Dancer (uncredited)
Self (targets Communists) (archive footage) (uncredited)
Soldier (uncredited)
Grauman's Usher (uncredited)
Self (Hollywood Ten, arrives, behind Biberman) (archive footage) (uncredited)
Self (Hollywood Ten, testifies) (archive footage) (uncredited)
Studio Guard Hal (uncredited)
Young Mrs. Trimble (uncredited)
Cassanova (uncredited)
Girl at Welcome Home Party (uncredited)
Old Lady (uncredited)
Sword fight (uncredited)
FBI Agent (uncredited)
Theater Patron (uncredited)
Elephant (uncredited)
Party Member (uncredited)
Driver / Theater Patron (uncredited)