• 
• Eddie Acuff
• McClelland
  

• 
• Wylie Adams
• A Commissary Sergeant
  Kraemer
  

• 
• Jack Carr
• Chambang
  

• 
• Eduardo Ciannelli
• Aristides Agramonte
  

• 
• Francis Compton
• A Major of the Royal Air Force
  

• 
• Charles K. Gerard
• Adrian Stokes
  

• 
• Lloyd Gough
• An Army Chaplain
  Laboratory Assistant
  

• 
• Harold Hoffat
• Roger P. Ames
  

• 
• Colin Hunter
• An Official of the Kenya Colony Government
  

• 
• Bernard Jukes
• Laboratory Assistant
  

• 
• Whitford Kane
• Dr. Carlos Finlay
  

• 
• Robert Keith
• Jesse W. Lazear
  

• 
• Geoffrey Kerr
• Stackpoole
  

• 
• Sam Levene
• Busch
  

• 
• Richie Ling
• Colonel Tory
  

• 
• Barton MacLane
• James Carroll
  

• 
• John Miltern
• Walter Reed
  

• 
• Millard Mitchell
• William H. Dean
  

• 
• Jock Munro
• Laboratory Assistant
  

• 
• George Nash
• William Crawford Gorgas
  

• 
• Robert Shayne
• Harkness
  Major Cartwright
  

• 
• James Stewart
• O'Hara
  

• 
• Frank Stringfellow
• Orderly
  

• 
• Clyde Walters
• Orderly
  

• 
• Katherine Wilson
• Miss Blake
  

• 
• Sidney Howard
• Writer
  

• 
• Paul De Kruif
• Written in Collaboration with
  

• 
• Guthrie McClintic
• Staging
  Producer
  

• 
• Jo Mielziner
• Scenic Design