- Previous episode S03E09 - A Voice in the Dark
- Number S03E10
- Director Joe Menendez
- Writers Emily Whitesell, Eric Wald
The Toll of the Sea
In an effort to save Hope, Ryn and Ben confront Tia in an undersea battle between the mermaid tribes. Maddie and Robb work to find a cure for Xander. Helen and the hybrids help restore order. Ted struggles to accept Ben's reality.