“There’s no place for personal triumph in a film like this,” says Harrison Ford dryly, referring to his return to the screen as mercenary adventurer Han Solo in Star Wars’ monumental sequel, The Empire Strikes Back. Although Ford shares star billing, he is painfully aware that he and the other featured performers are mere pawns in a projected nine-part series of sci-fi films, cartoonlike components with little more dimension than the hapless androids C-3PO and R2D2.