Ep 19. The Splendid Source

In Family Guy season 8 episode 19 titled "The Splendid Source," the Griffin family goes on a mission to find the source of all the world's dirty jokes. The episode begins with Peter telling an off-color joke at the dinner table that disgusts his family, prompting Brian to explain to him that jokes like that have been passed down for generations and originated from one central source.

Determined to find this source, the Griffin family embarks on a worldwide adventure that takes them from the streets of London to the depths of the Amazon rainforest. Along the way, they meet a variety of characters including an eccentric billionaire, a group of indigenous tribesmen, and a sexually charged dolphin.

As they get closer to their goal, the family begins to unravel, with tensions running high and secrets being revealed. Peter struggles to deal with his jealousy over Lois' past relationships, while Stewie becomes increasingly paranoid and starts to question reality itself.

In the end, the family finally discovers the source of all dirty jokes, but what they find is not exactly what they expected. The episode ends with a hilarious twist that leaves viewers laughing and wanting more. Overall, "The Splendid Source" is a classic and unforgettable Family Guy episode that is sure to entertain fans of the show.