Guest Stars Jane Wymark as Joyce Barnaby Barry Jackson as Dr. George Bullard Catherine Bott voices Solo Voice Rupert Vansittart as Selwyn Proctor Serena Gordon as Ginny Sharp Dilys Laye as Vera Hopkins Caroline Harker as Tamsin Proctor Barbara Leigh-Hunt as Marjorie Empson Gerda Stevenson as Sandra Bradshaw Eamon Geoghegan as Barman Jay Smith as Police Technician Angela Thorne as Lady Lavinia Chetwood Jesse Birdsall as Harry Painter Anton Rodgers as Lord James Chetwood Christopher Ravenscroft as Dr. Rupert Bradshaw