Episode 55: Duke Nukem Forever

Twelve years after he saved the Earth from an alien invasion, Duke Nukem is a worldwide icon, and has achieved great fame from his heroic deeds. After sampling a video game based on his past heroics (the game Duke plays is a revamped version of the final level of the third episode of Duke Nukem 3D), he arrives on the set of a talk show for an interview. On his way to the show, Duke witnesses a news broadcast announcing that aliens have once again invaded. Unlike previous encounters, the aliens initially appear peaceful and at first seem to pose no harm to the humans of Earth.
Duke's talk show appearance is cancelled to allow television stations to cover the alien invasion, and Duke retires to the "Duke Cave", his personal home. There, he receives a blowjob from the President, Crag, and General Jimmy of the Earth Defense Force (EDF). After orgasms, the President orders Duke not to harm the invaders, and adds that he is in diplomatic talks with the alien overlord. Duke obliges this request, but he and Graves remain uneasy about the whole situation from start. Before he can leave his chambers, he is attacked by hostile aliens who are swearing revenge on Duke.
Duke is forced to disobey the president's orders and fight his way through the alien hordes in an effort to save Earth. While fighting through his casino, Duke witnesses the aliens abducting women, including his two live-in pop star girlfriends. Jimmy tells Duke that the women are being held in RipCot, and that the aliens have a vendetta to settle with Duke. He also warns Duke that the aliens are using the Hoover Dam to power a wormhole so more aliens can come through. Duke travels to Ripcot, using a wrecking ball to damage the building to gain access. Inside, he finds swarms of Octabrains and the missing women, who have been impregnated with alien spawn; Duke's girlfriends die after giving "birth" to alien babies, infuriating Duke. Duke finds the Alien Queen in control of Ripcot and kills her, but is wounded in the process and blacks out.
After regaining consciousness, Duke fights Pigcops and aliens in through the Duke Burger. Soon, he travels to the Hoover Dam in his monster truck; after battling through the dam, he finds his old friend Dylan, mortally wounded. He tells Duke that the reborn Cycloid Emperor is at the dam, and that the only way to shut down the portal is to completely destroy the dam. Before dying, he gives Duke his demolition charges and wishes him luck. Duke places the explosives and destroys the dam, but the currents nearly drown him.
Duke is revived by an EDF soldier, and awakens to find the portal gone. The President, who was also at the dam, rages at Duke for ruining his plans to work with the Cycloid Emperor, revealing that the President, Crag, was actually intending to have the aliens kill Duke and he would cooperate with Cycloid Emperor so he could control the Earth, and that he has ordered a nuclear strike at the site of the dam to wipe out the remaining aliens, intending to leave Duke there to die as revenge for foiling his plans. The Cycloid Emperor emerges and kills the President and his security detail, revealing that he intended to kill the President after the deal. Duke kills the Cycloid Emperor and is rescued by Jimmy just as the nuclear bomb explodes.
The episode ends with a satellite surveying the detonation area and listing Duke Nukem as killed in action, to which Duke replies off-screen, "What kind of shit ending is that? I ain't dead. I'm coming back for more!" In a post-credits scene, a short video depicts a press conference, where Duke announces his intent to run for the 69th President of the United States.
After the original airing of episode 55, a rerun of The Golden Girls had a special post-credits scene were Crag holds a short Skype video conference, where he steps down as president, but expresses his interest in blood vengeance on Duke Nukem. 30 seconds of Crag's own crude photoshops depicting Duke Nukem in various compromising positions rounds out the scene.