Siren S03E10 The Toll of the Sea - Season Finale

Siren 3x10 "The Toll of the Sea" Season 3 Episode 10 Promo trailer (Season Finale) - 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, while Helen and the hybrids help restore order. Ted struggles to accept Ben’s reality.

» Watch Siren Thursdays at 10pm on Freeform
» Starring: Eline Powell, Alex Roe, Fola Evans-Akingbola, Ian Verdun, Rena Owen