No matter how funny a comedy show is, its best moments are always defined by it serious episodes. Along with "Godfellas" this is my favorite episode in the series. Bender, Fry, and Leela are sent on the same mission which killed Professor Farnsworth's previous crew: collecting honey from killer space wasps. Although Fry does not want to go, Leela forces him. As they are completing their mission, Fry jumps in front of Leela, taking the wasp sting that was meant for her. Following Fry's funeral, Leela suffers terrible guilt.
"The Sting" is a pivotal episode as it shows the deep emotional bond that Fry and Leela share. Although it does have moments of classic Futurama comedy (including the main cast breaking into a rousing rendition of "Don't Worry, Be Happy"), this is a really deep, serious episode, which will likely bring viewer to tears.