In need of attention, Skid cries out that Brandt is in danger. When his friends realize they’ve been fooled, they ignore Skid’s genuine cry for help, with potentially catastrophic results.

Skid carelessly disposes of a plastic bag, which leads to a chain of events that puts several characters, including Bobsie, at risk.

When Uma has a strange and sudden change of personality, Olly will have to ‘fess up' to a mistake in order to help his friend.

Bobsie goes in search of a mermaid and ends up helping save a manatee from the perils of a speedboat.

Olly and Skid play a prank on Beth, fooling her into believing there’s a live Plesiosaur in a cave. But the prank backfires when Olly and Skid get the fright, and Beth spots a rare ‘living fossil’.

While Dr. Kate is trying to talk a salvage operator into leaving an ancient shipwreck untouched, one of the salvaged artifacts goes missing, and Scopes is the prime suspect!

With Sub D coming, Beth works hard to clean up and breaks her nose light in the process. She’s forced to wear a huge replacement nose instead.

Olly and Beth set out to retrieve a downed satellite but Dirk beats them to it. Meanwhile, because of their love for old sci-fi movies, Skid, Brandt and Bobsie are convinced that the satellite has returned to Earth with more than just scientific information aboard.

While on a deep sea adventure Olly discovers many strange phenomena, including a disappearing shipwreck and some interesting deep sea fish.

In trying to buddy up to Brandt, Bobsie Otter fibs about having a real treasure map and he almost loses his newfound friend – for good!