Britt Robertson and Shelley Hennig, The Secret Circle Britt Robertson and Shelley Hennig, The Secret Circle

The Secret Circle's big secret may not stay secret for very long.

In Thursday's episode of the magical CW series, Zachary (Dave Baez), a mysterious man with a connection to Cassie's mother, begins looking into the secret coven, coming face-to-face with Cassie (Britt Robertson) and Diana (Shelley Hennig).

Meet The Secret Circle's Secret Coven

Now that the girls finished binding the circle, the confrontation with Zachary helps them uncover something very interesting about the state of their powers — but is he the only person who knows?

The Secret Circle airs Thursdays at 9/8c on The CW. If Secret Circle cast a spell on you, vote for it in our fall TV popularity contest here.