Michael Bofshever

After a mass murder at an Internet security company, evidence indicates that the person responsible is not a typical serial killer; Prentiss is required to complete recertification training.

Everyone's lives on Wisteria Lane are forever changed when a hostage situation occurs at a local supermarket.

Susan professes her love for Ian while Gaby and Carlos try to rekindle their love, and Bree is confronted with Orson's past.

Torres and Lightman question a former gang leader who claims to be rehabilitated; Loker and Foster look into the death of a firefighter who was killed in the line of duty.

Beckett races to find a stolen toxin capable of killing thousands of people; Castle has less than 24 hours to live after being exposed to the chemical weapon.

Being forced to reveal the truth about his illness leaves Walt facing the prospect of how to pay for an expensive series of cancer treatments.