Britt Robertson gives us an inside scoop on her character Cassie and the world of The Secret Circle. Don’t miss The Secret Circle, Thursdays this fall on The CW. The Secret Circle videos: Cassie Blake was a happy, normal teenage girl - until her mother Amelia dies in what appears to be a tragic accidental fire. Orphaned and deeply saddened, Cassie moves in with her warm and loving grandmother Jane in the beautiful small town of Chance Harbor, Washington - the town her mother left so many years before - where the residents seem to know more about Cassie than she does about herself.