Special Guest Stars Annette Badland as Betty Jackson Andrew Brooke as DCI Percy Hand Guest Stars Tommy Bastow as Barry Jackson Roger Barclay as Major Nigel Findlay Maimie McCoy as Rosie Wilden Elarica Johnson as Lucy Trumpington-James Phoebe Thomas as Amy Redfern Milo Twomey as Paul Redfern Nicholas Agnew as Tolly Trumpington-James Clare Lawrence Moody as Lizzie Findlay Rebecca Bainbridge as Polly Dart