Taped for HBO in August 1998, on the final date of Jerry Seinfeld's tour appearances at New York City's Broadhurst Theater, I'm Telling You for the Last Time presents the standup comedian's so-called "final" standup, or at least his final tour with the standup material that made him famous.
In a rowdy stand-up set, Shane Gillis riffs on his girlfriend's Navy SEAL ex, touring George Washington's house and being bullied by an Australian Goth.
The Duchy of Grand Fenwick decides that the only way to get out of their economic woes is to declare war on the United States, lose and accept foreign aid. They send an invasion force (in chain mail, armed with bows and arrows) to New York and they arrive during a nuclear drill that has cleared the streets.