• 
• John Gielgud
• Jason
  

Replacement

• 
• Judith Anderson
• Medea
  

• 
• Florence Reed
• Nurse
  

• 
• Richard Boone
• Soldier
  

Replacement

• 
• Jon Dawson
• Soldier
  

Replacement

• 
• Martha Downes
• Attendant to Medea
  

• 
• Hugh Franklin
• Aegeus
  

• 
• Kathryn Grill
• Second Woman of Corinth
  

• 
• Albert Hecht
• Creon
  

• 
• Richard Hylton
• Jason's Slave
  

Replacement

• 
• Gene Lee
• Child
  

• 
• Dennis McCarthy
• Soldier
  

Replacement

• 
• Don McHenry
• Tutor
  

• 
• Grace Mills
• First Woman of Corinth
  

• 
• Ben Morse
• Soldier
  

Replacement

• 
• Peter Moss
• Child
  

• 
• Bobby Nick
• Child
  

• 
• Marian Seldes
• Attendant to Medea
  

• 
• Leone Wilson
• Third Woman of Corinth
  

• 
• Euripides
• Playwright
  

• 
• Robinson Jeffers
• Book Adaptation
  

• 
• John Gielgud
• Director
  

• 
• Ben Edwards
• Scenic Design
  

• 
• Castillo
• Costume Design
  

• 
• Peggy Clark
• Lighting Design
  

• 
• Tibor Serly
• Incidental Music
  

• 
• Jean Barrere
• Stage Manager
  

• 
• Ben Morse
• Assistant Stage Manager
  

• 
• Edward Choate
• Business Manager
  

• 
• Thomas V. Bodkin
• Company Manager
  

• 
• Barry Hyams
• Press Representative
  

• 
• Lawrence Weiner
• Advertising
  

• 
• Robert Whitehead
• Producer
  

• 
• Oliver Rea
• Producer