Guest Stars Geraldine James as Julie Wells Hannah Arterton as DC Ally Caine Michael Maloney as Alan Wells Don Warrington as Ray Kenwood Sophia La Porta as Britnay Shearer Kim Allen as Jane Shilling Lauren Douglin as Izzy Allan Aedan Duckworth as Young Mark Saoirse-Monica Jackson as Sasha Niall Greig Fulton as Richard Payne Lara Bradban as Blonde Dylan Jupp as Simon Marshall Leon Ward as Andy Megan Bradley as Young Pru Charles De'Ath as Dominic Porter Alexa Davies as Alexa Sophie Simnett as Blonde Student Cherrelle Skeete as Clare Seeta Indrani as Dr. Khan Lola Mae Loughran as Chrissie Alex Okoampa as Rashan Leah Haile as Cocky Student James Boyland as DS Cal Brown Shaheen Khan as Mrs. Palmer Paul Ryan as Mr. Mills Debra Baker as Mrs. Mills Kirsty Sawyer as Chloe Heather Phoenix as Psychologist Yemisi Oyinloye as Desk Sergeant Helen Barford as Police Officer