New recruit police officers get a baptism of fire in the Belfast force for BBC One drama series Blue Lights, set to become the latest must-watch show.
Sian Brooke stars as social-worker-turned-rookie-cop Grace Ellis - but she won't be the only familiar cast member to viewers as the cast is packed with actors you'll recognise.
But where have you seen them before? From Game Of Thrones to Doctor Foster and Vikings, here's where the cast have popped up in recent years...
Sian Brookes plays Grace Ellis She's been a respected social worker her whole career, but in her 40s and with a teenage son, Grace decides to turn her life on its head by joining the police force.
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