Fans of the hit animated movie Monsters Vs. Aliens will surely enjoy this new trailer for the Monsters Vs. Aliens animated series, debuting on Nickelodeon Saturday, April 6. The network will also air a half-hour special entitled Welcome to Area Fifty-Something on Saturday, March 23, directly following the Kids' Choice Awards. The series is a continuation of the Monsters Vs. Aliens movie, following the blob B.O.B., the mad insect scientist Dr. Cockroach, and gigantic woman Susan, who all try to adapt to this new world filled with aliens. Take a look at the first footage from this upcoming animated series.