More of Ryn's people come to the shores. But something's forcing them there.
Decker shows up in Bristol Cove, which causes all sorts of damage.
Ben works with his Ted, to find info from the inside. Maddie gets to know Elaine better. Chris returns to Bristol Cove.
The longer Ryn is out of the water, the more she deteriorates. At the military compound, the other mermaid causes chaos.
Maddie and Ben try to help Ryn, as well as study her. Xander tracks down a lead on Chris, who's still locked up in the military's lab.
Kreizler believes Native American mythology, misunderstood by the killer, is part of the ritualism in the child murders across New York.
The return of Samara in RINGS is an unexpected, Gothic treat for fans of the dreaded VHS' tape's mythology.