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 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.

Grissom and his team look for a killer after the remains of a young boy who starved to death are found in a plastic container.

A shortage of blood in the ER during a winter storm leads to a difficult decision. Dr Greene and Dr Del Amico attempt to save a security guard that was shot on the job.