His last UK television appearance was for the BBC when he gave a chilling performance as the paedophile murderer, Sidney Cooke in The Lost Boys.
As is the way of things, the play had been written some ten years before in came to being produced, and been in pre-production for some considerable time, however, a few weeks before the opening night, Lord Mountbatten was murdered by the IRA.
Devastated by such viciousness, that was unrelated to the qualities of his play, and in spite of an audience reaction that was the exact opposite to blinkered, biased, critics, Glyn Jones did not write another word for ten years.
Late in 1964, Jones was contacted by David Whitaker, the story editor on Doctor Who, with a view to the writer contributing a serial.
He directed at a number of theatres in the UK, at RADA and, in America at James Madison University in Virginia where he also acted in a number of productions, Dodge in Buried Child, Argon in The Imaginary Invalid and Eddie Carbone in A View From the Bridge, and for a summer season at the Wayside Theatre, Virginia he directed two plays, Tribute and The Innocents and acted in three: Barefoot in the Park, Private Lives and A Funny Thing Happened on the Way to the Forum.
He performed in Neil Simon's Fools and The Fantasticks in dinner theatre and was invited by Furman University to play Dysart in Equus and work with students on Shakespeare.
He wrote the screenplay for the Oscar Nominated Columbia Film, A King's Story on the life of the Duke of Windsor Edward VIII.
In 1997 he moved to Vamos, Crete, Greece which meant forgoing any acting or directing but he kept writing, starting with his autobiography No Official Umbrella, two novels, Angel and The Journeys We Make, a Gothic horror The Museum Mysteries & Other Short Stories, and five books in his comedy / thriller series featuring a quirky private eye, Thornton King, and his sidekick, Miss Holly Day: Dead On Time, Just In Case, Dead On Target, The Cinelli Vases, and Celluloid and Tinsel.
The week before he died, he was working with Beate Staufenbiel on the translation into German of two more of his plays, Rosemary and Hear the Hyena Laugh which received its posthumous premiere in January 2016.
His autobiography, No Official Umbrella,[3] has been described as, '... vastly entertaining from its description of his South African boyhood to his early vigorous and experimental life in the rural theatres of England and on to the big London stage.