Story : Per Lucy's suggestions, Ian experiments on her to discover her slayer essence and learns her blood makes his blood normal when mixed together. Lucy professes her love to Ian. ""Marissa"" tells Ricky their kiss shouldn't have happened but stops short of confessing she's really Casey. Ricky wants to reignite their passion but Casey resists to focus on her mission. Jack, Jamal, Rafe and Alison try to get Tess to see the truth about Caleb, as Tess only sees the good in him. Jack goes to Caleb and provokes him and Caleb attacks him. Just as Caleb's ready to bite him, Rafe enters with Tess, who pleads with Caleb not to hurt Jack.