Gabrielle goes to great lengths to hide her affair; Lynette tries tough love to discipline the twins; Bree and Rex try marriage counselling.
Cal Lightman and his team assist federal law enforcement in the specialist field of lie detection. Lightman turns his talents to solving a teacher's murder.
The Charming chapter is pulled over by dirty cops on their way to a summit meeting; Jax announces the end to the gun business with the IRA; Bobby brings in new members to the Charming chapter.
The team are called to Arizona to investigate a series of codes left by a suspect following two brutal murders.
As Vivian undergoes open-heart surgery, Jack and the team search for a missing woman who may be the innocent victim of an identity theft ring.