
A veteran beat cop and teenage girl fall to their deaths from a tower block in south-east London, leaving a five-year-old boy and rookie police officer Lizzie Griffiths on the roof, only for them to go missing. Detective Sergeant Sarah Collins is drafted in to investigate, working to find Lizzie before she comes to serious harm, but also to uncover the truth behind the grisly tower block deaths.

as DCI Tim Bailie

as Mary Shaw

as Skye Brannon

as Sgt Fred Thompson

as Georgina Teel

as PC Colin Ryle

as Marley Daniels

as Ray Walker

as Derek Holt

as Neil Slattery

as Ben Mills

as Laptop Girl

as Dr Gower

as Armed Police Responder

as Dodgy Van Driver (uncredited)