Lily Knight

A girl can't remember killing her best friend, despite holding the murder weapon, so Jane finds a way to jog her memory.

A brutal storm rocks Chicago; Halstead encourages Dr. Grace Song to go against her own findings for the benefit of their patient; Asher rushes to the hospital to help Archer's pregnant patient; Maggie's concern for Ben consumes her.

A patient with Alzheimer's disease brings back difficult memories for Richard and April, while Jackson struggles to return to normal life.

A young girl is found murdered, and when Megan arrives at the scene, she finds Tommy covered in blood. As the evidence piles up against him, Tommy claims he cannot remember what happened the previous night.

Jane and Maura literally race to find a killer at the Boston Marathon who shoots runners during the event.

A frightening being is summoned, one that even the possessed Sister Mary Eunice is afraid of. As Kit and Lana resort to desperate measures, a despairing Sister Jude finds she can no longer run from her past.