Guest Stars Brian Protheroe as Deubner Nicola Pagett as Countess Nadja Michael Aldridge as Archduke Othmar Bill Horsley as Herr Wiegand Alan Cullen as The British Ambassador Geoffrey Colvile as Lenke Francis De Wolff as Walter Frankenburg Ronald Lewis as Dagobert Trostler Harold Kasket as Dr. Heinrich Weinlich Denis Thorne as Berthold Carolyn Jones as Countess Tildi Leys Michael Mulcaster as Count Czernik
