Don't count on Stewart pulling a Sally Field any time soon on The Grinder.

Having lived in his famous bro's shadow for so long, Stewart (Fred Savage) is cripplingly paranoid about befriending new people. Because obviously the only reason anyone would like him is to get close to Dean (Rob Lowe).

His so-called "Dean Effect" sensors are in full force on Tuesday's episode when a new couple, Lyle (Nat Faxon) and Vanessa Gerhart (Alexie Gilmore), invites Stew and Debbie (Mary Elizabeth Ellis) to a fundraiser. But are they really just buttering them up to ask Dean?

Fall TV Popularity Contest: Vote for your favorite new shows now!

Check out the exclusive sneak peek below. The Grinder airs Tuesdays at 8:30/7:30c on Fox.