In the 1970s, a member of the IRA takes over an Active Service Unit in London after his wife is accidentally shot dead in Ireland. The unit's mission is to cause chaos and destruction, while his personal aim is to hunt down his wife’s killer — an SAS captain, who is also hunting him.
Colin Morgan
as Michael O'Hara
Aml Ameen
as Tempest
Mark Strong
as Holland
Felicity Jones
as Catherine
Sophia Brown
as Ruth
Tom Vaughan-Lawlor
as Keenan
Will Keen
as Woodville
Mairéad Tyers
as Carol
Dara Devaney
as Twomey
Andrea Irvine
as Fiadh
Jack McMullen
as Cole
Steve Wall
as Quinn
