Sarah Lancashire, James Norton, and Siobhan Finneran will return for six new hour-long episodes written by the show’s creator Sally Wainwright, AMC and the BBC confirmed today (October 26). 
Lancashire will reprise her BAFTA-winning role as Sergeant Catherine Cawood, a strong-willed West Yorkshire police officer who is haunted and taunted by the manipulative murderer and sex offender Tommy Lee Royce (Norton). Finneran will return as Catherine’s rather troubled sister, Clare. 
A press release teases: "When Catherine discovers the remains of a gangland murder victim in a drained reservoir it sparks a chain of events that unwittingly leads her straight back to Tommy Lee Royce. Her grandson Ryan is now sixteen and still living with Catherine, but he has ideas of his own about what kind of relationship he wants to have with the man Catherine refuses to acknowledge as his father. 
“Still battling the seemingly never-ending problem of drugs in the valley and those who supply them, Catherine is on the cusp of retirement."
Happy Valley debuted on BBC One in 2014 and returned for a second season in 2016. Season three will start shooting in and around West Yorkshire in 2022, before premiering on BBC One and AMC+ later in the year. Lancashire said rather cryptically of the final season: “It’s time to let the dog see the rabbit.”
Kristin Jones, EVP International Programming for AMC Networks added: "We're thrilled for AMC+ to be the exclusive U.S. home of this highly-rated and enthusiastically reviewed hit series. Sally Wainwright’s riveting police series is the perfect addition to AMC+’s ever-widening library of acclaimed and international dramas and we’re looking forward to catching up with the upcoming adventures of Catherine and the other residents of this intriguing town."
Are you looking forward to a return trip to Happy Valley?