The Father, the Son & the Holy Fonz

When Grandpa Griffin comes for a visit, he, as usual, tries to impose his religious beliefs on the family. This causes Peter to search for a new religion, his own religion. Of course, he turns to his idol: the Fonz, and establishes a Church of the Fonz, which proves to be a bigger success then they could ever have imagined. Meanwhile, a mishap puts Stewie living in a bubble.