The murder of a female GP in a rural playground in front of numerous witnesses draws a group of detectives into an ever-darkening mystery that takes them across Europe, aided by mysterious notes sent by the "Ghost Detective".

Indira Varma

Nina Suresh

Robert Glenister

Bobby Day

Neil Stuke

Michael Niles

Christiane Paul

Linda Felber

Lesley Sharp

Lucy Cannonbury

Anjli Mohindra

Meghan Waters

Dino Fetscher

Alec Wayfield

Michael Maloney

Dr Crowley

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