Jenni Blong

A serial rapist sends a letter to the squad, announcing his return to Philadelphia after five years, and his plan to strike again.

While explaining Peter's otherworldly origins to Olivia, Walter flashes back to 1985, and more secrets are revealed.

When a furious farmer camps outside the White House, Cal must find out if he means harm, especially when it is claimed he is armed with explosives.

Sookie asks Lafayette to summon her parents, while Eric and Tara take drastic measures when Pam finds herself in dangerous territory. Sarah Newlin reconnects with Jason, and Jessica seeks atonement.

Trying to recall his plan, Walter takes an LSD-laced trip down memory lane; a mysterious signal leads Peter and Olivia to the woods, where they come upon a grisly scene.

Givens is asked to protect an eccentric judge from a mysterious and deadly attacker; Boyd Crowder's new-found religious zeal starts to annoy the criminal community.