Greg Cromer

A massive earthquake rocks the city and throws everything into chaos. Plus, Russo recommends Officer Nolan for a protective detail of Brad Hayes, a man whose dealings have put a target on his head.

With Chang pressing for membership in the study group, Annie's latest crush has Jeff reeling as Shirley unveils some stunning news.

Dean Pelton's army surplus party food sparks an outbreak of zombie-ism at the Greendale Halloween party.

The gang signs up for some "easy A" courses in the new semester. Shirley (Yvette Nicole Brown) shines in sailing class, while Jeff's (Joel McHale) popularity is threatened by the "cool" guy in his pottery class.

With the girls being forced to go their separate ways for a bit, Aria, Emily, Hanna and Spencer need each other now more than ever.

The BAU team flies to Iowa to investigate the disappearance of three 10-year-old children, who appear to have been abducted from their homes. The surveillance video from a park is the team's only lead to finding the children's whereabouts.