Fourth Omicronian invasion of Earth

The Fourth Omicronian invasion of Earth occurred in 3013, "led" by Lrrr's son Jrrr, in order for Jrrr to earn a planetary invasion merit badge. Ironically, Jrrr was one of the only surviving "popplers" - larval Omnicronians - who escaped consumption by humans during the Second Omicronian invason of Earth. Indeed, Jrrr had actually been responsible for ending the Second Invasion, by begging his elders to show mercy to humanity.

Jrrr's invasion was very amateurish, and amounted to being dropped off by his father's spaceship on the White House lawn, ringing the front doorbell, and nervously announcing to President Nixon that he was invading. Jrrr was so nervous that he could barely stammer out his words, to the point that Nixon had to ask him to speak up when Jrrr demanded Earth's surrender. As it turned out, Nixon's response to alien invasions is to cave in to their demands, so he immediately summoned Zapp Brannigan to sign a surrender agreement. Unfortunately this resulted in the accidental vaporization of Nixon's vice president, the headless clone of Spirew Agnew (apparently one of a series of clones, as Nixon remarks that this was "my second to last Agnew!".

Jrrr flees after Agnew's death, and Nixon retaliates by making a planet-wide special broadcast announcing a blockade of Omicron Persei 8. This blockade includes cultural exports, i.e. blocking all Earth television transmissions to Earth.

The subsequent blockade is commanded by Zapp Brannigan aboard the Nimbus, but it is not effective in preventing the Planet Express Crew from sneaking onto the planet.

The Fourth Omicronian invasion apparently represents either growing strength on the part of the DOOP fleet, or more probably, growing incompetence of the Omicronians. The First Invasion was launched when the Omicronians missed the 1,000 year old finale of Single Female Lawyer, during which the Omicronians successfully overwhelmed Earth's military defenses and space fleet, also led by Brannigan and the Nimbus. In contrast, during the Fourth Invasion, Earth successfully retaliated by blocking all Earth television broadcasts, and blockading Omicron Persei 8 itself. It isn't clear if the relative strength of each side has drastically shifted, or if Lrrr simply didn't want to risk another long-term war by attacking the blockade fleet - but keep in mind that the Omicronians were willing to launch their first full-scale invasion of Earth over missing a single TV season finale, yet all television broadcasts were jammed as a result of the blockade following the Fourth Invasion.