Bill Lee Brown

After Hal and Lois leave town for a getaway, "squatters" crash Reese's party, take over the house and refuse to leave.

The team searches for a serial killer who is preying on married couples; Hotchner looks to a team member to fill JJ's vacant role.

Al's organization, NO MA'AM, leads a strike when Al's favorite show, Psycho Dad, is cancelled.

A monster starving for human brain matter tries to remedy his own unusual eating habits.

J.D. and Drew learn a tough lesson in mentoring when Dr. Cox and Lucy show them that the student is sometimes the teacher.

Ellie tricks Jules into baby-sitting on her own for a day; Bobby gets a chance to play golf for free; Andy offers to be Laurie's wingman.