9 Saturday 8:00 pm     The Apartment (1960) An aspiring executive lets his bosses use his apartment for assignations, only to fall for the big chief's mistress. Jack Lemmon, Shirley MacLaine, Fred McMurray. D: Billy Wilder. BW 126m. LBX CC 10:30 pm     Two Mules for Sister Sara (1969) A wandering cowboy escorts a gunrunning nun through rough territory. Clint Eastwood, Shirley MacLaine, Manolo Fabregas. D: Don Siegel. C 116 m. 12:30 am     Being There (1979) Political pundits mistake an illiterate gardener for a media genius and turn him into a national hero. Peter Sellers, Shirley MacLaine, Melvyn Douglas. D: Hal Ashby. C 130m. LBX 3:00 am     Two Loves (1961) A conservative teacher struggles with her values while teaching natives in New Zealand. Shirley MacLaine, Laurence Harvey, Jack Hawkins. D: Charles Waters. C 97m. LBX