Guest Stars Seline Hizli as Margaret Ward Lorne MacFadyen as DC Phil Wilkinson Tom Austen as Guy Hopkins Claudie Blakley as Agatha Redmond Neil Morrissey as Harding Redmond Sam Frenchum as Gary Bell Helen Clyro as Phyllis Bell Lourdes Faberes as Mya Lyall Nigel Planer as Giles Montgomery Nicky Henson as Frank Archer Tim McMullan as Professor Raban Lisa Diveney as Agent Rollinson Rob Oldfield as Valentine Lyall Isabella Marshall as Theresa Becky Bullman as Suzy David Moorst as Lankester Lea Jackson as Lisa Josh Bolt as Rory Crompton Matthew Tennyson as Kit Bartlett