Episode of the series The Name of the Game directed by Steven Spielberg, later re-shown as a standalone TV movie. Series star Gene Barry is on his way to a conference on the environment - ecology is what they called it then - when he has a car accident that renders him unconscious. He's awakened in the year 2017 in a dystopian future-Los Angeles that has relocated underground following an ecological disaster that has left much of the planet uninhabitable. Barry tries to learn what exactly led to this nightmare scenario, and is disturbed by the fascist government led by Barry Sullivan. Also featuring Sharon Farrell, Paul Stewart, Severn Darden, Edmond O'Brien, Louise Latham, Michael C. Gwynne, and Geoffrey Lewis.
This "glimpse into the future" gets much of it wrong, as usual, such as a primitive question answering computer, but it's still amusing to see the worries of the day, most of which are still present. Some noteworthy touches: the cops are also degree-holding psychiatrists that spout psycho-babble; milk is a luxury and status symbol; a visit to a nightclub features an elderly acid rock band performing for a bunch of geriatric hippies; and a discussion about a "supposed sighting of a real Negro in Cleveland", which hasn't been seen since "the riots of '86".
Over 50 years later I have to admire this episode's cheek, especially given the banality of current TV fare. Recommended, though it is usually found only in truncated versions.