The following people are credited as replacements or additions if they were not credited on opening night.

Company Manager: James Turner.

Production Stage Manager: Frank Bayer; Assistant Stage Mgr: Jeffrey Hillock, Joe Muzikar, Rock Townsend.

Press Representative: Joshua Ellis; Press Assistant: Anne Obert Weinberg, Warren Knowlton.

Arthur Burghardt	Thomas Leary
Dennis Cooney	Doctor Watson
Richard Council	"Lightfoot" McTague
	Ensemble
Jonathan Freeman	"Lightfoot" McTague
Geoff Garland	Sidney Prince
Tobias Haller	Billy
Michael Hartman	Ensemble
Michael Hawkins	Doctor Watson
	Ensemble
Kim Herbert	"Lightfoot" McTague
	Ensemble
Jeffrey Hillock	Ensemble
	Newsboy
Patrick Horgan	Sir Edward Leighton
	Sherlock Holmes	(Apr 22, 1975 - ?)
Diana Kirkwood	Thérèse
	Alice Faulkner
Lynne Lipton	Alice Faulkner
Richard Lupino	John Forman
Michael Mellinger	John
Susan Merril-Taylor	Ensemble
Joe Muzikar	Ensemble
John Neville	Sherlock Holmes	(May 13, 1975 - ?)
Robert Perault	Ensemble
Robert Phalen	Alfred Bassick
Christina Pickles	Madge Larrabee
Ron Randell	James Larrabee	(Feb 4, 1975 - ?)
Clive Revill	Professor Moriarty
Rex Robbins	Sir Edward Leighton
Robert Stattel	Doctor Watson
Robert Stephens	Sherlock Holmes
Fred Stuthman	Count Von Stahlburg
Alan Sues	Professor Moriarty
Elizabeth Swain	Thérèse
Tony Tanner	Sidney Prince
Tom Tarpey	Jim Craigin
Matthew Tobin	John
	Parsons
Rock Townsend	Ensemble
	Newsboy
Richard Woods	Jim Craigin
	Sir Edward Leighton

Standbys: Patrick Horgan (Sherlock Holmes), Rex Robbins (Sherlock Holmes).

Understudies: Richard Council (Jim Craigin), Jonathan Freeman (Jim Craigin), Michael Hartman ("Lightfoot" McTague), Michael Hawkins (Doctor Watson), Kim Herbert (Jim Craigin, John Forman), Jeffrey Hillock (Billy), Diana Kirkwood (Alice Faulkner, Madge Larrabee), Susan Merril-Taylor (Thérèse), Joe Muzikar ("Lightfoot" McTague, Ensemble, Alfred Bassick), Robert Perault (Count Von Stahlburg, Thomas Leary), Robert Phalen (James Larrabee), Robert Stattel (Alfred Bassick, John Forman), Fred Stuthman (Professor Moriarty), Elizabeth Swain (Alice Faulkner), Tom Tarpey (Sir Edward Leighton), Matthew Tobin (Sidney Prince), Rock Townsend ("Lightfoot" McTague, Billy), Josef Warik (Doctor Watson), Richard Woods (Sir Edward Leighton).