When Bart was running away from an angry mob, L.T. Smash rescued him in his car and took him back to Bart's house. Smash revealed to the Simpson family that he was forming a boy band, the Party Posse, and he wanted Bart in for his bad boy attitude. Bart hastily agreed and eventually Marge allowed it, signing the contract. Smash then took Bart to Classified Records to meet his fellow band members; Milhouse, Nelson and Ralph.
Smash served as the Party Posse's manager, watching over them when they recorded songs or put on live shows. After Lisa found out that there was subliminal messaging in the Party Posse's songs to get people to join the US Navy, Lisa went to L.T. Smash to tell him about it. However, she found out that Smash was in with Navy and he was behind it. To show the power he had as a Navy recruiter, Smash yelled at Lenny and Carl, telling them to join the Navy, to which they both did. Smash then told Lisa that she couldn't leave as she knew too much, only to find that Lisa had already left.
The Party Posse were then holding a concert on the USS Sea Spanker. A Navy admiral told Smash during the show that he was shutting down the boy band project as Mad was about to put out an issue mocking the Party Posse. The admiral then shut down the voice enhancer that improved the singing of the band. Smash then started to sail the ship towards New York City to destroy Mad Magazine Headquarters. Upon arriving, he had Nelson and Ralph load missiles into the launchers and fired them at the building, destroying it. He was then led away in handcuffs by the Irish policeman.
Smash was part of Homer's doomsday survival club. He welcomed Homer and his family to the new house when they arrived to stay away from the rest of society. He also attended every meeting. He then later chased after the Simpson family and was surprised to find that civilization was still going like normal.
L.T. Smash is a Navy soldier and that shows through his fake personality as a cool, hip record producer a lot. Whilst he started out keeping the Navy part of him under control, the longer he stayed in his role as a record producer, the more that mask started to slip. This was seen when he yelled at the children at the Party Posse concert and called them "maggots". Smash is also very dedicated to his role and to the Navy's boy band program. When he was told by his superior that the program was being shut down, Smash refused to obey and decided to go and attack Mad magazine instead, not worrying about the legality of this.