6x07 The Late Philip J. Fry

on a time machine

Just slow it down. I'll shoot Hitler out the window.

This is one of the most important episodes of the show imo. I still remember my reaction when I saw this episode for the first time, mindblowed to see a second Big Bang and finally go back in time by going forward.
As usual, I’m a bit sensitive to Futurama episodes involving sadness, but loved how they balanced sadness and comedy on this one.