American Dad is about the misadventures of the Smiths in a fictional town named Langley Falls. Stan Smith's a CIA Agent, Francine's his wife, Steve is the dorky kid and Roger and Klaus are both the anthropomorphic talking fish and alien respectively. Since Seth McFarlane put a lot more effort in this then in Family Guy, I think the next big thing would be a movie based off of the show. The casting for the movie will be the following.