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

Desmond Barrit	Hector	(Jul 18, 2006-Jul 23, 2006)
Bill Buell	TV Director
Frances de la Tour	Mrs. Lintott	(Aug 22, 2006 - ?)
Richard Griffiths	Hector	(Jul 25, 2006 - ?)
LeRoy McClain	Other Boy
Clive Merrison	Headmaster	(Aug 22, 2006 - ?)
Pippa Pearthree	Make-up Lady
Malcolm Sinclair	Headmaster	(Jul 11, 2006-Aug 20, 2006)
Maggie Steed	Mrs. Lintott	(Jul 11, 2006-Aug 20, 2006)
Alex Tonetta	Other Boy
Jeffrey Withers	Other Boy

Understudies: Bill Buell (Headmaster, Hector), LeRoy McClain (Akthar, Dakin, Rudge), Pippa Pearthree (Mrs. Lintott), Seth Sklar-Heyn (Other Boy, TV Director), Alex Tonetta (Posner, Scripps, Timms, TV Director), Jeffrey Withers (Crowther, Irwin, Lockwood).