Futurama S04 E01 Roswell That Ends Well

"Defying gravity and common sense."

A spacetime accident leaves the Planet Express crew stranded in Roswell, New Mexico in the year 1947, where a shattered Bender is mistaken for UFO debris and Zoidberg is captured as an alien specimen. Leela and the professor work to get everybody home, while Fry tries to keep his accident-prone grandfather alive.