Guest Stars Diane Fletcher as Elizabeth Urquhart Colin Jeavons as Tim Stamper Kenneth Gilbert as Harold Earle Christopher Owen as McKenzie William Chubb as John Krajewski Damien Thomas as Michael Samuels Malcolm Tierney as Patrick Woolton Miles Anderson as Roger O'Neill Alphonsia Emmanuel as Penny Guy Kenny Ireland as Ben Landless David Lyon as Henry Collingridge Isabelle Amyes as Anne Collingridge John Hartley as Greville Preston James Villiers as Charles Collingridge Angela Rippon as Newsreader Richard Braine as Kevin Spence Hugh Dickson as Dr. Christian Bill Wallis as Political Reporter Ian Collier as Man at Clinic John Pirkis as Young Man at No. 10 Subash Singh Pall as Waiter