When does Happy Valley return?

Happy Valley is a British crime drama television series. Starring Sarah Lancashire, James Norton and Siobhan Finneran. It won the 2015 BAFTA Award for Best Drama Series. The first series began on BBC One on 29 April 2014, the second on 9 February 2016 and the third and final series on 1 January 2023.
Catherine Cawood is a divorced police sergeant with two children. She is raising her grandson, Ryan, who was born due to her daughter being raped by Tommy Lee Royce. When Royce's mother is killed, Catherine is implicated in several murders. Catherine is tasked with investigating a human trafficking operation linked to serial killings.