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