In the Year of the City 2274, humans live in a vast, bubbled metropolis, where computerized servo-mechanisms provide all needs so everyone can pursue endless hedonism. Endless, that is, until Lastday, when anyone who's 30 must submit to Carrousel, a soaring, spinning trip to eternity and supposed rebirth. The screen's first use of laser holography highlights this post-apocalyptic winner of an Academy Award for "Best Visual Effects." Michael York plays Logan 5, a Sandman authorized to terminate Runners fleeing Carrousel. Logan is almost 30. Catch him if you can. Also starring Jenny Agutter, Farrah Fawcett, Peter Ustinov, Richard Jordan and Roscoe Lee Browne.