The six-year on-again, off-again relationship between Robert (Brad Garrett) and Amy (Monica Horan) is definitely on again in this pivotal episode. So much so, in fact, that ""Robert wants to propose to Amy,"" says executive producer Philip Rosenthal. But there's one formality the hopeful groom-to-be must take care of first: asking Amy's devout churchgoing folks (Fred Willard, Georgia Engel