Us Rating: **1/2 Johnny Depp returns as irreverent Jack Sparrow in the fourth installment of the wacky adventure series. This time, the pirate embarks on a quest for the fountain of youth, racing against rivals Blackbeard (Ian McShane) and Captain Barbossa (Geoffrey Rush) — yet finding time to romance ex-flame Angelica (Penelope Cruz). The actress livens things up somewhat as she and Sparrow spar in a tavern, sling insults and double-cross each other. And campy Rush continues to amuse: When he and Sparrow are captured, he drinks from his wooden peg leg — and offers Sparrow a swig! But the entertaining flick gets bogged down by endless, listless swordfights. Plus, McShane’s serious Shakespearean delivery doesn’t belong in such a satirical romp.