Mark Williams

as Father Brown

John Burton

as Sergeant Goodfellow

Sorcha Cusack

as Mrs Bridgette McCarthy

Jack Deam

as Inspector Mallory

Tom Chambers

as Chief Inspector Sullivan

Nancy Carroll

as Lady Felicia Montague

Alex Price

as Sid Carter

Emer Kenny

as Penelope "Bunty" Windermere

Ruby-May Martinwood

as Brenda Palmer

Claudie Blakley

as Mrs Devine