Frustrated by erratic and uncontrollable behavior at the hands of his troublesome alter ego, fed up Professor Sherman Klump undergoes a radical experiment that separates his personalities and allows scoundrel Buddy Love to become his own person. This time around they're battling each other for possession of invaluable scientific research which only further complicates matters in Sherman's personal life with colleague Jackson. Murphy, who's clearly having fun in his pull-out-all-the-stops portrayal of a horny grandmother, is as likable and energetic as he's ever been, but the script is awfully slim and throws out only a few genuinely funny ideas, which is a disappointment considering the impact of its predecessor. **