This Sunday evening on "Sunday Night Playhouse", Vintage Classic Radio brings you a rare sci-fi double bill from the archives of the Canadian Broadcasting Corporation.

Our first feature is a haunting adaptation from CBC Sunday Theatre in Calgary, H.G. Wells' story, "The Crystal Egg", originally aired on March 26. 1972. Long before he unleashed the Martian apocalypse in "The War of the Worlds", Wells hinted at interplanetary observation with his eerie tale of a London curiosity shop owner who stumbles upon a mysterious crystal orb -- one that reveals visions of life on Mars. As the elderly shopkeeper becomes obsessed with the glimpses he sees, the story draws us into questions of surveillance, alien life, and the limitations of human understanding. This compelling dramatization stars Henry Comer, was adapted by Leslie McFarlane, and brought to life under the direction of Fred Diehl.

Next, we journey deeper into the cosmos with an atmospheric production from "The Mystery Theatre", one of CBC's most ambitious dramatic efforts, featuring weekly thrillers from across Canada. In this 1968 adaptation of Arthur C. Clarke's gripping short story "Breaking Strain", two astronauts aboard a space freighter bound for Venus face the ultimate moral dilemma when a catastrophic systems failure reveals there's only enough oxygen for one man to survive. What begins as a cool-headed conversation between professionals devolves into a chilling study of human instinct, fear and the ethical boundaries of survival. Crafted with the CBC's signature dramatic flair, the production underscores Clarke's mastery of psychological tension and philosophical depth in the face of technological isolation.

Join us for this thought-provoking exploration of early science fiction storytelling from two literary giants, tonight on Vintage Classic Radio.