Guest Stars Sheila Scott Wilkinson as Pam Richard Butler as Commander Nicholls Michael Gambon as Herr Muller Elisabeth Sladen as WPC Nadim Sawalha as Lead kidnapper Mark Eden as Journalist Brian Wilde as Professor Munro Ann Lynn as Frau Muller Karen Stark as Hilda Muller Peter Marshall as Schoolboy witness Zara Daley as Schoolgirl witness Patsy Trench as Kidnapper Nigel Baguley as Kidnapper
