Sylvester McCoy Doctor Who Actor Sophie Aldred Ace Actor Anton Diffring De Flores Actor Metin Yenal Karl Actor Fiona Walker Lady Peinforte Actor Gerard Murphy Richard Actor Leslie French Mathematician Actor Martyn Read Security Guard Actor Dolores Gray Mrs Remington Actor Chris Chering Skinhead Actor Symond Lawes Skinheads Actor David Banks Cyber Leader Actor Mark Hardy Cyber Lieutenant Actor Brian Orrell Cyberman Actor Chris Clough Director John Nathan-Turner Producer Kevin Clarke Writer