Just in case you didn't believe us that The Simpsons were going all LEGO, here's more proof. Coming on the heels of our preview a week or so back, the project combines two American pop-culture icons yet again for a full-length episode to add to the series' already historic primetime run. Set to air May 4, the episode follows their collaboration on the Springfield house and minifigure set to see the entire Simpsons cast and universe transformed into bricks in similar 3D effect as the blockbuster movie. The episode, number 550, has been two years in the making and continues a strong run for both brands, even with their decades-long resumes. Continue after the jump to see a trailer for the upcoming episode and make sure to tune in this Sunday night, May 4, to catch it in-person.