Mermaid mating season has begun, with Ryn knowing she will need to go back to the sea to help her colony. Beth convinces Levi to come with them to a remote location to the other hybrids of his kind, leading Helen and Rick on a hunt to find them. Ben and Ryn follow, only to discover a stranger cult-like group that is joyful of their presence.
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- Beth: "Yes, we have a secret."
- Helen: "And you'd go to any lengths to protect it."
- Beth: "Yes, but that doesn't mean we killed John."
- Helen Hawkins: "My father was also killed."
- Beth: "A hundred and fifty years ago, Charles Pownall led a massacre! You can't be naive enough to believe it won't happen again."
- Beth: "You can sit there in judgment, but do you imagine what would happen if we were found out!? We would be victimized if not rounded up! That family, the Pownalls, they're still around."
- Helen: "We are Pownalls."
- Beth: "What? Our great-grandparents fled the massacre, they didn't lead it!"
- Helen: "It was on the DNA test that led me to Rick."
- Rick: "She never told me about that."
- ―Helen reveals to Beth that they're related to the Pownalls.
- Ryn: "You never told me this about your family. We talk about it and you said nothing!"
- Ben: "I'm sorry. I made a mistake. I should have told you."
- Ryn: "Why?"
- Ben: "I was afraid."
- Ryn: "Afraid?"
- Ben: "Of you thinking I am the same as Charles."
- Ryn: "Shame."
- Ben: "Yes. I am ashamed to be related to someone who could do that."
- ―Ryn finds out about Ben's family history
- Ryn discovers that Ben is a direct descendant of Charles Pownall, the human who massacred her kind centuries ago.
- It is revealed that during mating season, both the merman and mermaid's skin glow with a tan-colored light.
- The merpeople's graveyard, where Donna and Charles Pownall's mermaid/human daughter are buried, has been violated.
- In this episode, we learn about a mermaid's reproductive system: they have a bicornuate uterus just like one a whale or a dolphin has.
- Calvin finds a police academy application, Xander reveals that he could do so much more as an officer of the law. Calvin encourages him to pursue this.
- Maddie discovers that Ben's houseboat has hidden cameras that have been placed by the military.