• 
• Willam A. Bush
• Cardinal
  

• 
• William Engel
• Papal Guard
  

• 
• Neil Fitzgerald
• Rector of St. Andrew's College
  

• 
• Truman Gaige
• Cardinal Berstein
  

• 
• Tom Gorman
• Cardinal
  

• 
• John Hallow
• Papal Chamberlain
  Bailiff
  Dr. Talacryn
  

• 
• Christopher Hewett
• Father St. Albans
  

• 
• Robert Hewitt
• Cardinal
  

• 
• Peter Jobin
• George Arthur Rose
  

• 
• Arthur Marlowe
• Cardinal
  

• 
• Richard Nicholls
• The Cardinal-Archdeacon
  

• 
• Gerard Parkes
• Jeremiah Sant, F.R.S.
  

• 
• Marie Paxton
• Agnes
  

• 
• Michael Stein
• Papal Guard
  

• 
• Sydney Sturgess
• Mrs. Crowe
  

• 
• Theodore Tenley
• Cardinal
  

• 
• Louis Zorich
• Cardinal Ragna
  

• 
• Colin Hamilton
• Father St. Albans
  

• 
• Dan Hogan
• Papal Chamberlain
  

• 
• B.J. DeSimone
• Ensemble
  

• 
• Gillie Fenwick
• Bailiff
  Dr. Courtleigh
  

• 
• Carl Jessop
• Ensemble
  

• 
• John Kramer
• Ensemble
  

• 
• Joseph Neal
• Ensemble
  

• 
• William Needles
• Bailiff
  Dr. Talacryn
  

• 
• Alan Rachins
• Ensemble
  

• 
• Robert Shattuck
• Ensemble
  

• 
• Dan Drake
• Ensemble
  

• 
• James McDonald
• Ensemble
  

• 
• Dean Santoro
• Ensemble
  

• 
• Roderick Cook
• Fr. William Rolfe
  

• 
• Sylvia O'Brien
• Agnes
  Mrs. Crowe
  

• 
• Willam A. Bush
• Cardinal Berstein
  

• 
• Tom Gorman
• Dr. Courtleigh
  

• 
• John Hallow
• Dr. Talacryn
  Father St. Albans
  

• 
• Robert Hewitt
• Jeremiah Sant, F.R.S.
  

• 
• Carl Jessop
• George Arthur Rose
  

• 
• Arthur Marlowe
• Rector of St. Andrew's College
  

• 
• Michael Stein
• Cardinal Ragna
  

• 
• Theodore Tenley
• The Cardinal-Archdeacon
  

• 
• Dan Hogan
• Dr. Talacryn
  Father St. Albans
  

• 
• John Holzman
• Ensemble
  

• 
• Dean Santoro
• George Arthur Rose
  

• 
• Peter Luke
• Writer
  

• 
• Fr. Rolfe
• Based on "Hadrian the Seventh" and other works by
  

• 
• Peter Dews
• Director
  

• 
• Robert Fletcher
• Scenic Design
  Costume Design
  

• 
• Lloyd Burlingame
• Lighting Design
  

• 
• Ben Janney
• Production Stage Manager
  

• 
• Wayne Carson
• Stage Manager
  

• 
• Charles Gray
• Stage Manager
  

• 
• Joe Hanrahan
• Assistant Stage Manager
  

• 
• John Holzman
• Assistant Stage Manager
  

• 
• Robert Shattuck
• Vocal Coach
  

• 
• Richard Horner
• General Manager
  

• 
• Leonard Soloway
• Company Manager
  

• 
• Harvey B. Sabinson
• General Press Representative
  

• 
• Lee Solters
• General Press Representative
  

• 
• David Powers
• Press Representative
  

• 
• Ingram Ash
• Advertising
  

• 
• The Blaine Thompson Agency
• Advertising
  

• 
• Lester Osterman Productions (Lester Osterman, Richard Horner, Lawrence Kasha)
• Producer
  

• 
• Bill Freedman
• Producer
  

• 
• Charles Kasher
• Producer