David Hyde Pierce

While preparing his case against Cary, Finn discovers a potentially devastating piece of evidence which could have ramifications for Alicia and Peter. Meanwhile, Eli becomes wary when a new prospective candidate emerges in the race for State's Attorney. David Hyde Pierce guest stars.

Alicia faces a crisis of conscience when she's encouraged to go negative in her campaign for State's Attorney. Meanwhile, the Feds try to persuade Cary to work with them as they attempt to build a case against Lemond Bishop.

Alicia prepares for a key interview which could impact the outcome of the race for State's Attorney. Also, Louis Canning pressures Florrick/Agos/Lockhart to agree on a settlement in his wrongful eviction case against the firm.

Alicia and Frank Prady square off in a crucial debate in the race for State’s Attorney as Peter and the city of Chicago prepare for a potential riot. Chris Matthews.

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.