This fall, The CW is doubling up on their Thursday night supernatural romances. The new show The Secret Circle is joining The Vampire Diaries, from the same executive producer Kevin Williamson and based on books by the same author, L.J. Smith.

Britt Robertson stars as Cassie, a teenager whose mother is killed by mysterious magic. She moves to Chance Harbor with her grandmother, where a group of young witches teaches Cassie about her family powers. They need her to complete their circle. Adam (Thomas Dekker) is a predestined partner through family lineage. He’s dating Diana (Shelley Henning...