Chad Rook

Ben and crew of The North Star uncover a device emitting a strange sound. Ryn finds shelter in the home of the local folklore expert.

Chris escapes the facility as the military enter a state of high alert, but he's not the only one to make it out.

Maddie rushes to Ryn's rescue after she is taken in for questioning. Meanwhile, Ben and Xander return to the deep sea to search for answers, but end up having an unwelcome meeting with an uninvited guest.

As the town of Bristol Cove comes to terms with a recent loss following an incident on the ocean, each of its citizens cope in different ways and it also provides a new education in human emotions for Ryn.

As Decker continues to hunt down the missing mermaid he sees as his, the extent of his connections becomes clearer.

Magnus and Will investigate a number of unexplained disappearances of teenagers and trace them to an unusual rehab clinic in Mexico - run by none other than Nikola Tesla, one of the original Five. Tesla accidentally reveals the treatment will turn his unsuspecting victims into vampires over a 30-year period - but one of the patients discovers the formula to speed up the process.