Joe McCarthy
Paul Cunningham
Logan (as Heather Menzies)
Joseph Welch
Sen. Margaret Chase Smith
Mrs. DeCamp
Sen. Scott Lucas
Middleton
Sylvester
Jean Kerr
Wisconsin Farmer
Logan's Boss
Sarah
Dwight Eisenhower
Armitage
Publisher
Pete
Librarian
Eisenhower Publicist (as Allan Oppenheimer)
General George C. Marshall
Peter Parker McNair Gates
Gen. Lampkin
Ray Jenkins
Gen. Zwicker
Robert Ten Broeck Stevens
Drew Pearson
Roy Cohn
Sen. Stuart Symington
Mrs. Sarah Gates
President Harry Truman
James Juliana
Robert F. Kennedy
Sen. Karl Mundt
Sen. Raymond Baldwin
Sen. Herbert Lehman
Dean Acheson
Lt. Ted Cantwell
Eisenhower Aide
Wm. Roberts
Sen. Richard M. Nixon
Speaker
Clucas
Marie
Chas. Kraus
Reporter
Navy Doctor
Divorced Wife
Gen. George C. Marshall (uncredited)
Photographer in Jeep (uncredited)
Office Worker (uncredited)
Congressman (uncredited)
Ohio Reporter (uncredited)