Ryn and her folk fight for their lives against Katrina. Maddie finds out a huge secret.
Ted’s obsession puts him in danger. Ryn and Tia experience a violent difference in opinion.
Nicole helps Ben and Maddie research the siren song appropriately. Other discoveries come to light.
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.