In 1954, [Thelma Moss] co-wrote the mystery comedy Father Brown, based on a short-story by G. K. Chesterton, starring Alec Guinness in the titular role. Essentially the future Obi-Wan Kenobi chases an art thief around France. A particularly entertaining scene finds Father Brown in quite a pickle, when his nemesis overpowers him in the Paris Catacombs and ties him up against a pile of bones.
One startling moment involving Alec Guinness was surely an influence on Thelma's later decision to study parapsychology. In his memoirs, entitled Blessings in Disguise , Guinness tells the story of an evening when he met Thelma Moss for dinner in Los Angeles. At a little Italian bistro named Villa Capri they find no tables available and leave discouraged, but James Dean comes to the rescue, following them outside and inviting them to join him at his table. On the way back to the restaurant, bursting with pride, James Dean draws their attention to his new sports car in the parking lot.
Despite James Dean’s boyish enthusiasm, like a true Jedi master, Alec Guinness gravely blurts out, “Please never get in it. It is now ten o’clock, Friday the 23rd of September, 1955. If you get in that car you will be dead in it by this time next week.” Catching himself, Alec Guinness swiftly apologized, blaming his strange outburst on jet-lag from an international flight. Thelma, Alec, and James went on to have a lovely dinner. Unfortunately, James Dean wouldn't take Alec Guinness’s spooky advice to heart. By 4 p.m. the following Friday, James Dean was indeed dead, killed in an accident in his new sports car.