The Irregulars

Henry Lloyd-Hughes
Sherlock Holmes

Royce Pierreson
Dr. Watson

McKell David
Spike

Thaddea Graham
Bea

Jojo Macari
Billy

Harrison Osterfield
Leopold

Darci Shaw
Jessie

Clarke Peters
Linen Man

Eileen O'Higgins
Alice

Micah Loubon
Luke Porter

Lisa Dwyer Hogg
Sister Anna

Edward Hogg
Daimler

Nicola Goodchild
Archivist

Daniel Fearn
Barman

Suzie Chard
Prostitute

Anthony Bessick
Ring Announcer

Rory McCann
The Bird Master / Arthur Hilton

John Alan Roberts
Reporter (uncredited)

Darryl Bradford
Middle Class Gentleman (uncredited)

Manoj Anand
Middle Class Professor (uncredited)