Martin Clunes

as Sir Arthur Conan Doyle

Arsher Ali

as George Edalji

Charles Edwards

as Alfred Wood

Art Malik

as Reverend Shapurji Edalji

Emma Fielding

as Charlotte Edalji

Hattie Morahan

as Jean Leckie

Alan McKenna

as Inspector Campbell

Conleth Hill

as Sergeant Upton

Pearl Chanda

as Maud Edalji

Hilary MacLean

as Connie