Logan's Run

Set in the year 2274, when ecological disaster has driven civilization to the protection of domed cities, the story revolves around a society that holds a ceremonial death ritual for all citizens who reach the age of 30. In a diseaseless city where free sex is encouraged and old age is virtually unknown, Logan (Michael York) is a "sandman," one who enforces this radical method of population control (but he's about to turn 30 and he doesn't want to die). Escaping from the domed city via a network of underground passages, Logan is joined by another "runner" named Jessica (Jenny Agutter), while his former sandman partner (Richard Jordan) is determined to terminate Logan's rebellion.