The following information is derived from the cast list for this episode, held in the Crawford Collection:
Keith Eden (Eric Lamb), Eve Wynne (Alma Lamb), Rob Steele (Normie North), Vernon Weaver (Joey Slade), Tom Lake (Keith Pringle), Ken Webb (Snr. Sgt. Baxter), Raymond Simpson (Postal Clerk), Jack Mobbs (Taxi Driver), John Proper (Bernie Bergin), Wendy Gilmore (Joyce Redman), Valerie Jellay (Mrs. Tucker), Clive Hearne (Sgt. Wilkie)
The file contains two copies of the cast list, one with certain roles still uncast and one with the names of actors for those roles added in black ink. Neither of the copies offers names for the actors cast as '8 EXTRAS FOR LINE-UP' or '3 EXTRAS FOR NURSING HOME'.