Ben, Maddie and the other humans deal with the fallout from the attack on the oil rig, while the mermaids reacclimate to their ocean home. Ryn comes back to land…

Ryn goes back to the ocean to get help for Ben and Maddie’s conditions but discovers that continuing to go back may get harder than she realized the longer she’s…

While Jamie’s under arrest, she manages to manipulate Mitch and Logan into helping her hunt shepherds, members of a secretive group responsible for sterilizing humans

Mitch seeks to rescue Clementine from her captors, and a glimpse into Jackson’s sister Abigail’s past reveals the origins of the hybrids.

The team sets out on a rescue mission for Abe and Dariela’s son, Isaac. Then, in search of information on a new hybrid, Mitch and Jamie travel to California, where…