With a show like Regular Show, anything can be expected from any episode. With this in mind, the first episode of the season four was something totally new and original. The show's tagline "it's anything but" may refer to the strange creatures that appear out of seemingly mundane activities but in this case, it refers to the fact that this was nothing like anything ever done before.
When the episode starts and a man with a suit is shooting the main cast in the head with a laser, the first thing that popped into my head was "what did Mordecai and Rigby do now." Mordecai and Rigby both manage to escape using the time machine used in the episode "Bad Kiss." Two months pass and Mordecai and Rigby come back. Everyone has had their memories erased and their time at the park has been replaced with other common place jobs. In a very Lost season six fashion they do things that make them remember everything from the time and override the brainwashing. Once Mordecai, Rigby, Skips, High-Five Ghost, Muscle Man, and Pops are gathered, they go to find Benson so they can get the park declared a historical landmark and stop the construction of Exit 9B. Unfortunately, they are captured and it is revealed that the whole thing was a revenge scheme by the son of Garret Bobby Ferguson (the giant Jesus head from season one) to bring back his father and kill everyone in the park. Fortunately, Skips calls in all their allies from the first seasons. An epic battle ensues and, upon Benson and Thomas (the new goat intern) signing the petition, the villains are all sucked back into hell.
Despite it's similarities to a Dragon Ball GT story line with the deus ex machina ending similar to Power Rangers in Space, the episode is something totally new and unique to the show and introduces the new character Thomas in a way that leaves the audience wanting more of him.
I give the premier a 9.5 out of 10 rating and I only take off the .5 because I would have preferred this episode been the 100th episode special.
Rating: 9.5/10 Keep it up.