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 … Gemma Whelan, Jimmy Akingbola, Tahirah Sharif, Emmett Scanlan, Harriet Webb, Karl Davies, Nick Holder Added on BritBox 2022-05-15. Added on Amazon Prime 2023-07-06. Youtube Trailer