Britt Robertson

As if Cassie Blake wasn't in enough trouble already, The Secret Circle's newest witch will be spending Valentine's Day with a few extra, ahem, people around.

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While Faye (Phoebe Tonkin) and Melissa (Jessica Parker Kennedy) are tempting Diana (Shelley Hennig) with "Devil's Spirit" at their anti-Valentine's Day slumber party, Cassie (Britt Robertson) will turn to Adam (Thomas Dekker) and Jake (Chris Zylka) for help after the daughter of John Blackwell becomes haunted by the spirits of some vengeful witches — and by the looks of the clip below, those spirits are seriously powerful.

The Secret Circle airs Thursdays at 9/8c on The CW.