Guest Stars Sean Murray as DI Monty Fowler Howard Saddler as DC Trevor Richard Lou Gish as Linda Harris Claire Huckle as Paula Mowbray Jane Hazlegrove as Margaret Walkinshaw Simon Bowen as DC Frank Collins William Bateman as DC Phil Leighton Samantha Whittaker as Louisa Paricelli Peter Penry-Jones as Professor Littlejohn Paula Stephens as Gwen Atkins Alec Nicholls as Paul Tucker Lionel Guyett as Mr Paricelli Tam Hoskyns as Counsellor Cate Hamer as Dr. Fleming