Tom Bidwell Creator McKell David Spike Actor Thaddea Graham Bea Actor Jojo Macari Billy Actor Harrison Osterfield Leopold Actor Darci Shaw Jessie Shaw Actor Clarke Peters Linen Man Actor Royce Pierreson John Watson Actor Henry Lloyd-Hughes Sherlock Holmes Actor Ameen Mustapha William Cooper Guest Star Rory McCann The Bird Master, Arthur Hilton Actor Anthony Barclay Dave Oliver Guest Star Anthony Bessick Ring Announcer Actor Suzie Chard Prostitute Actor Daniel Fearn Barman Actor Nicola Goodchild Archivist Actor Edward Hogg Daimler Actor Lisa Hogg Sister Anna Actor Micah Loubon Luke Porter Actor Marli Siu Susan Shipley Actor Ian Whyte Plague Doctor Actor