While looking for the missing surfer, Paula and Philipp meet a diver and discover a clue. With a shark fin on his back, the diver had scared half of Hamburg. But why? Meanwhile, Eulalia has shown up in Hamburg ready to help. She's made a discovery, too.
Eulalia just found a clue that might help Paula and Philipp -- a perfect opportunity to use the perfect tense. Pay close attention to forming the past participle.