"Roswell That Ends Well"
This episode is always a fan favourite, and for good reasons too. This episode brought the time-travel storyline into the Futurama franchise and overall its pretty much flawless. The Roswell plot of Fry meeting with his grandfather Enos was hilarious, as he ends up killing him by mistake and accidently becoming his own grandfather by sleeping with his grandmother at the same time. Zoidberg was in top form too delivering most of the jokes, and Leela and Farnsworth trying to blend into the 1940s was super funny too! Bender is awesome too, especially near the end! For having no flaws the whole time and delivering so many funny moments, this episode easily hits in my top 5 and for those who want a full-packed 22 minute episode, this is the one to go for!