The Breakthrough — A Story by Daphne du Maurier — A Teleplay by Graham Evans and Clive Exton
Dispatch the maimed, the old, the weak, destroy the very world itself, for what is the point of life if the promise of fulfilment lies elsewhere?
On the windswept coast of rural Suffolk, a deranged scientist attempts to extract the essence of life itself.
There are very audible echoes of Peter Newbrook’s The Asphyx and even Peter Sasdy’s The Stone Tape, scripted by Nigel Kneale in The Breakthrough, though it’s actually based on a Daphne Du Maurier short story that predates both of them. Written in 1964 as a favour to Kingsley Amis who was looking to put together an anthology of science fiction stories that was never published, the short story turned up in Du Maurier’s 1971 collection Not After Midnight, and Other Stories. Graham Evans’ television play, adapted by Clive Exton, is faithful to the story but possibly as a consequence it’s far too leisurely for its own good.
Computer specialist Stephen Saunders (Simon Ward) is sent by a government minister, Sir John Fowler (Anthony Nicholls), to a laboratory, Saxmere, situated on the salt marshes of the East Suffolk Coast, ostensibly to help maintain it’s fantastically clunky and oh-so-70s computer – all oscilloscopes, huge reels of tape and inexplicable banks of flashing lights. It turns out that the Saxmere team, made up of “Mac” Maclean (Brewster Mason), Robbie (Clive Swift), Janus (Roy Boyd), Ken (Thomas Ellice, here credited as Martin C. Thurley) and Cerberus the dog are trying to use the computer to help them capture human psychic energy (or “Force 6” as Mac dubs it) at the very moment of death. The terminally ill Ken is chosen as the test subject and a developmentally challenged young local girl, Niki (Rosalind McCabe), who shows some talent as a medium and seems to have caused poltergeist activity in the past, is drafted in to act as a conduit to him after he dies. The experiment seems to be a success but Niki reports back that Ken wants his life force released and the researchers realise with horror that their process captures more than just psychic energy.
— Kevin Lyons — EOFFTV - The Encyclopedia of Fantastic Film and Television