Watch the Promo for Siren “A Voice in the Dark”

The promo for the next new episode of Siren has been released. The episode is called, “A Voice in the Dark” and it will air on Thursday, May 21.

In the episode, “Tia unleashes a deadly attack on Bristol Cove. Ryn, Ben and Maddie race against time to find a cure for Xander’s mysterious illness, while anticipating Tia’s next move. Baby Hope returns to land to reconnect with Ryn.”

What did everyone think of last night’s episode?

Source: Freeform