Reanimator

The Reanimator is a device created by Farnsworth that works similarly to an upright toaster which makes an exact clone of a recently deceased person, with their memories intact, using X-rays, DNA samples and scrapings of the inside of one's tennis shoes. Originally it could only work for Fry, then Bender was added, and later Leela. Fry had finished the fight with Destructor and, when cleaning Mom's office, Igner found the Reanimator and played with its buttons until it fell to the floor a long distance down. As the destruction of the Reanimator occurs at the end/beginning of the time loop, if the loop can be broken the Reanimator would not necessarily get destroyed.