The series Season 1 DVD has several scenes and different takes of scenes that never made it to the final cut, including:
An alternate scene after Hayley reads Francine's note on the refrigerator and exclaims, "My mother stole my boyfriend!" and Stan exclaims, "Your boyfriend stole my wife!" Originally, the scene cut to an old woman with a beer bong and several frat boys standing around her as she says, "You know, these guys just asked me to have sex with them and I just might do it!" The final cut version replaces this with Stan suggesting that he and Hayley date each other as revenge for Jeff running off with Francine, then concludes with, "Wait a minute. Daddy didn't think that through".
A scene where an unnamed girl with piercings at Burning Man flirts with Klaus and thinks Klaus's fish body is a hallucination.
A scene after Hayley and Jeff make out where Stan encounters a strange man in a butterfly costume who tells him what he's seen. Stan then rips the man's wings off and the man curls into a fetal position, whimpering as two men in cat costumes bat him around.