BBC's new original show The Responder is billed as a "distinctive new take" on crime drama.
Written by former Merseyside Police officer Tony Schumacher, the show is said to hold a mirror up to the emotional extremes of life on the front line of British policing.
The Responder follows Chris Carson, a crisis-stricken, morally compromised, unconventional urgent response officer tackling a series of night shifts on the beat in Liverpool.
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Chris is forced to take on new rookie partner Rachel as he struggles to keep his head above water - both professionally and in his personal life.
Both soon discover that survival in this high pressure, relentless, night time world will depend on them either helping or destroying each other.
The Responder was filmed on location around Liverpool with Dancing Ledge Productions - whose previous projects include The Salisbury Poisonings and Porters.
Chris will be played by The Office and Sherlock star Martin Freeman, with the rest of the cast including Twilight actress Myanna Buring, and Harry Potter actor Ian Hart.
How many episodes of The Responder are there?
There are five episodes.
The first airs on Monday, January 24, at 9pm, with episode two at the same time on Tuesday, January 25.
The following three episodes will air nightly, on Monday, Tuesday and Wednesday (January 31-February 2) from 9pm.
Full cast list of The Responder:
Chris Carson - Martin Freeman.
Rachel Hargreaves - Adelayo Adedayo
Casey - Emily Fairn
Carl Sweeney - Ian Hart
Marco - Josh Finan
Ian - Philip S McGuinness
Kate Carson - MyAnna Buring
Barry - Mark Womack
Ray Mullen - Warren Brown
Phil - Dave Hart
Ellie - Kerrie Hayes
Kevin - Michael Starke
Trevor - Victor McGuire
Davey - David Bradley
Steve - Phil Barantini
June Carson - Rita Tushingham
The Responder starts Monday January 23 on BBC One at 9pm.
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