Great movie from 2000. Scooby-Doo and the Alien Invaders is by far one of the best online movies I've ever watched. Scooby-Doo and the Alien Invaders provides a great pleasure from watching it online. In my opinion, some of the actors roles were just a masterpieces which made an amazing impression on me. Whoever has not seen let it rush in front of the TV, because this movie just has to be seen. You can watch the movie online here or download it.