HE MAY NEVER CONQUER AMERICA, but in France, Gérard Depardieu is an acting Colossus. You can see why in Jean de Florette, which PBS is showing (Fri., Aug. 9, 9 P.M. ET) with subtitles. Depardieu plays a hunchback in the 1920s whose plan to turn inherited land into a working farm is doomed by the base treachery of his neighbors (Yves Montand and Daniel Autieul). Director Claude Berri's 1986 film is exquisitely beautiful and moving. Manon of the Spring, the second half of this pastoral epic set in Provence, involves the efforts of Depardieu's beautiful but feral daughter (Emmanuelle Beart) to avenge her father's tragic death. It airs the following week at the same time.