Adam Donshik

Arson investigation re-ignites the flame between Lightman and his ex-wife.

When Frank Prady (David Hyde Pierce) decides to go after Governor Florrick as a campaign tactic, Alicia is faced with the decision of whether or not to attack Peter's record as well. Also, when Florrick/Agos/Lockhart take on the case of a man paralyzed by a malfunctioning gun created on a 3D printer, they call on Kurt McVeigh (Gary Cole) to testify as an expert witness, which leads to a rift between Diane and her husband. Michael J. Fox and Denis O'Hare also guest star.

Ryan works an internship for Sandy. Summer and Seth try to impress Brown University. Johnny reveals how he feels about Marissa. Ryan and Marissa tell each other the truth.

Stan pursues a lead that puts him on the trail to one of Gregory's crew members, closing the gap between him and Elizabeth, and reigniting some of the deepest conflicts between her and Philip.

When Jake and Heather find a stranger on the side of the road who is sick and disfigured from radiation poisoning, they must decide whether to help him and risk contamination or do nothing and allow him to die. After they decide to help the stranger and take him to the hospital, Jake and Hawkins sit vigil in hopes that he will be able to give them information about what's going on outside of Jericho. Meanwhile, when the generator at the hospital is low on gas and supplies in town begin to dwindle, the police must ask disgruntled and panicked townspeople to siphon gas from their cars.