Lily Knight

When a girl is found covered in blood and holding the murder weapon that killed her best friend, she becomes an obvious suspect, though she can't remember anything. But Jane, believing she's innocent, engineers a risky maneuver in which she must relive the terrifying events in order to spark her memory.

A patient's condition leads to a conversation about Alzheimer's disease between Maggie and Richard; Jackson and April try to return to normalcy; Arizona realizes that Callie is moving on; Meredith reveals her fears.

When Alan's night terrors return, he asks his new, attractive secretary, Melissa, if she would sleep with him to keep him from hurting himself.

Sister Mary Eunice is terrified to discover a dark angel has descended on Briarcliff. Kit makes a bold move to be reunited with Grace.

The stakes are life and death when Tommy is accused of murder and Megan has to put her personal doubt aside to try to prove his innocence.

Zelena and Arthur cross paths with Merida, who is attempting to settle a debt; flashbacks reveal Merida's combat training.