2x12 - Richard in Stars Hollow
Newly retired Richard (Edward Herrmann) is driving Emily (Kelly Bishop) crazy, so Lorelai (Lauren Graham) is coerced into taking her father for a day in Stars Hollow, where he proceeds to drive both Lorelai and Rory (Alexis Bledel) batty while criticizing every aspect of their lives and refusing to let Rory accept the car that Dean (Jared Padalecki) has built for her.