Planet Express attack on Roswell Army Air Field

The Planet Express attack on Roswell Army Air Field took place in July 1947.

Background
After the Planet Express crew traveled back in time and crash-landed in 1947, Dr. Zoidberg and Bender's body were retrieved by the United States Army and sent to Roswell Army Air Field for analysis. Fry and Bender's head were sent in undercover to rescue the captive crew. Meanwhile, Leela and Professor Farnsworth go into the town of Roswell, New Mexico and try procuring a microwave to keep the rip in space-time open to help them get back to the 31st century. The Professor declared several times for no one to interfere with the flow of time and alter events. Fry ended up meeting his grandfather but accidentally killed him while trying to keep him safe and then slept with his grandmother and became his own grandfather. Meanwhile, Leela and the Professor failed in their efforts because the microwave had not been invented in 1947, but Leela noticed the microwave radar dish on the base.

After finding out what Fry did with his grandmother, the Professor declared "Screw history!" and decided to steal the radar dish and get everyone back to their time period before they cause any more damage.

The attack
The attack began with the Planet Express ship launching a graffiti-laden missile at a cache of barrels and proceeded with a laser bombardment of the barracks, causing destruction and a mass panic among the soldiers stationed at the base. Fry and Leela then jetpacked into the laboratory where Dr. Zoidberg was being autopsied upon, and Leela kicked the doctors and President Harry S. Truman. Fry proceeded to throw Dr. Zoidberg's organs at the President, which Zoidberg saw as an honor.

Meanwhile, the Professor (while sleeping) broke into the warehouse where Bender's body was housed and picked it up with his feet. They all return to the ship and steal the radar dish with the Army fully engaged, tanks and soldiers firing upon the ship with little effect. The crew then flew away with aircraft on their tail firing at the engines. The ship dove into an airplane hangar and abruptly flew upward through the roof, leaving the planes behind and escaping the atmosphere.

Aftermath
During their ascent, Bender's head falls back to Earth just before the ship goes through the time hole back to the 31st century. After Zoidberg is patched up Fry goes back to the area around Roswell and finds Bender's head, still alive after 1055 years.