I love when Klaus is in more of the show.

This episode is one of the more endearing ones I've seen from American Dad! Like the episode when Klaus gets a new body and Steve's friends think he turns into a werewolf, there weren't many hilarious moments in "An Apocalypse to Remember", but the way the main and subplots were balanced, and then seamlessly intertwined for the climax and conflict resolution put a huge smile on my face. It's this kind of attention to topical elements that makes AD! a clear winner over the other Seth Mac incarnations, especially Family Guy, which has become a parody of a parody of its original "self". This episode also managed to begin and end well, particularly the visual experience Steve has at the conclusion. Anyone like me who has taken psychedelics would appreciate it that much more. What happened with Shari & Buckle was also spectacular, as I have seen their appearances in later seasons but not this episode with their first appearance. Finally, this has to be one of Roger's best schemes: so much leveraged risk for such a petty objective, and with Klaus (who gets the perfect amount of screen time in this episode) helping him, it was a definite WIN!