The Grinder

Stew is worried that Dean Sr.'s anger problems will hurt his case, but Dean Sr. insists there's no problem at all. Dean says there's only one surefire way to find out what the people really think: they take it to the masses for some good old-fashioned focus group testing. Before long, the entire family gets caught up in the feedback of how they are perceived by others.

Dean and Stewart's mother, Lenore, makes a surprise visit, which causes Dean to panic, because Bonnie has never approved of his lifestyle. Meanwhile, Stewart is desperately trying to get reservations to the hottest restaurant in town for his anniversary dinner with Deb. With his ex-wife in town, Dean Sr. thinks he should get back into the dating scene and gets help from Ethan and Lizzie.

After finding out Dean Sr. is guilty, Stew thinks they should settle the case. Dean, of course, believes they should try to win, and wants to use one of his old "Grinder" tricks, by throwing himself into an unrelated sub plot that will lead him to what he needs to solve the case. Meanwhile, Stew is concerned that he is now "infected" by "The Grinder".

Dean Sr.'s malpractice trial is finally at hand and it will come to a surprising conclusion when Stewart gets sidelined, leaving it to the rest of the Sanderson & Yao team to save the firm and find out who has been the secret mastermind behind Cory Manler and Dean Sr.'s case. Stewart is concerned that Dean's instincts and Grinder-isms won't be enough to win the day, and Dean is offended by his own brother's lack of faith.