When a pizza deliveryman attacks a seemingly random couple, the team must navigate a complicated revenge scheme before they strike again.
Elizabeth tries to avoid international controversy after the Mongolian government sends her a horse as a gift; Gov. Sam Evans threatens to bring a lawsuit against Ohio for putting President Dalton on the election ballot.
Holmes and Watson look at a clown's murder, and the creation of a weaponised virus. Meanwhile, Bell's new love interest's ex targets him.
Bull tries to create reasonable doubt among the jurors when his friend goes on trial for the murder of his wife.
Logan and Falacci are frustrated in their attempts to find suspects in the apparent gang shooting of three college students with no gang affiliations.