 William B. DavisDoctor Watson | Doctor Watson |
 Denise CrosbyCaptain Norton | Captain Norton |
 Michael ColemanDr. John H. Watson | Dr. John H. Watson |
 J. P. WinslowSherlock Holmes | Sherlock Holmes |
| IIan CaseInspector Lestrade | Inspector Lestrade |
| AAndrew HamiltonLord Albert Hull | Lord Albert Hull |
| MMichelle LieffertzLady Rebecca Hull | Lady Rebecca Hull |
| SStewart CawoodWilliam Hull | William Hull |
| GGlenn MacRaeJory Hull | Jory Hull |
 Joanna DouglasTabitha Hull | Tabitha Hull |
 Erin FitzgeraldScreaming Maid | Screaming Maid |
| SShawna BerryHorrified Housekeeper | Horrified Housekeeper |
| DDustin J AllenOliver Stanley (as Dustin Allen) | Oliver Stanley (as Dustin Allen) |
| DDanette BoucherMrs. Hudson | Mrs. Hudson |
| MMonica Joan OgdenLieutenant Gleason | Lieutenant Gleason |
| CColin PlantMr. Barnes | Mr. Barnes |
| KKieran DunchYoung Solicitor | Young Solicitor |
| RRohan KeenanCarriage Driver | Carriage Driver |
| KKatelyn EscottYoung Rebecca | Young Rebecca |
| BBrady StarkCountry Doctor | Country Doctor |
| TTed RogersChairman of the Board | Chairman of the Board |
| KKeenan ThwaitesBoard Member | Board Member |
| JJames ThwaitesBoard Member | Board Member |
| DDarshan SanghaBoard Member | Board Member |
| SSandy OklenHull's Man | Hull's Man |
| BBrady BedardBilly | Billy |
 Lisa HindsCleaner | Cleaner |
| FFinn LynchCleaner's Boy | Cleaner's Boy |
| DDavid RadfordAuxiliary Doctor | Auxiliary Doctor |
| CChristina PattersonAuxiliary Nurse | Auxiliary Nurse |
