Dead Shot

Colin Morgan

Michael O'Hara

Aml Ameen

Tempest

Mark Strong

Holland

Felicity Jones

Catherine

Sophia Brown

Ruth

Tom Vaughan-Lawlor

Keenan

Will Keen

Woodville

Mairéad Tyers

Carol

Dara Devaney

Twomey

Andrea Irvine

Fiadh

Jack McMullen

Cole

Steve Wall

Quinn

Caolan Byrne

Hogan

Stephen McMillan

Lynch

Hywel Morgan

Uniformed Officer 2

Martin McCardie

Vet

Desmond Edwards

Special Branch Detective

Marianne McIvor

Jeanette (uncredited)

Lucianne McEvoy

Vet's Wife