Claypole actor Michael Stanniforth wrote and performed the unforgettable theme tune. His original song had to be re-written as concern grew that it was too close to The Exorcist.
Edward Brayshaw who plays Harold Meaker has also appeared in Doctor Who as the War Chief in The War Games and as Leon Colbert in The Reign of Terror.
Lynda La Plante, crime writer extraordinaire, appeared as ghost-nanny Miss Novak under stage name Lynda Marchal.
Sue Nicholls, having essayed the role of hyper-allergic Nadia Popov, went on to play Audrey Roberts in Coronation Street.
Rentaghost was Block's second choice for the show's title, having decided that the orginal monicker Second Chance wasn't child friendly enough.
Carry On... stalwart Kenneth Connor (Whatsisname Smith) also turned his talent to 'mad-cap' sit-coms 'Allo 'Allo and Hi-Di-Hi.
The men inside Dobbin also played the Myrka in Doctor Who's Warriors of the Deep. Regarded as one of the feeblest of monster costumes of all time, it is famous for electrocuting a karate-chopping Ingrid Pitt and savaging a mattress.
Rentaghost lyrics page - hear the phantom of the opera sing a haunting melody ...
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