S4·E4 The Painting

A patient of Rachel's mysteriously vanishes after their last session and bequeaths her a beautiful but odd painting. After learning more about the young woman's disappearance and the history behind the painting itself the team becomes convinced it must be destroyed. Kat's new friend decides to teach Kat the art of the craft and Kat learns new secrets about herself in the process but puts an old friend's life in danger.