This is the last episode of the show.
It is the last episode to premiere in 2008.
In the scene where Mac, Bloo, Coco, Wilt, and Eduardo are being chased by the weeble police, Bloo throws lego looking bricks at the cops and then says, "These people wobble, but they don't fall down." This line is a reference to the theme song Weebles - Welcome to Weeblevile! (2005).