Video: first appearances of recurring characters on The Simpsons

One of the unspoken rules about every adult animated series is that the show will inevitably develop a sizeable roster of supporting characters that will often rival the core cast in popularity. With almost 30 years under its belt, South Park has conjured so many hilarious recurring characters that the series could fully transition away from Stan, Cartman, Kyle, and Kenny and suffer no ill effects. — Read the rest