Guest Stars Tim Treloar as The Walking Man Anthony Webster as Ivan Penderecki Finnbar Hayman as Sergeant Cox Amanda Drew as Superintendent Driscoll George Russo as D.I. Richards Caroline Berry as Doctor Diaz Sarah Trevelyan as Ella Ward Kwame Bentil as D.I. Akers Andy Eadie as Clive Ward Willow Wright as Jennie Jensen Clayden as Henry