: "Roswell That Ends Well" serves as a definitive example of Futurama ’s ability to blend high-concept scientific theory—specifically the Grandfather Paradox —with irreverent satire and character-driven comedy.

: The episode suggests a closed-loop timeline where Fry was always his own grandfather.

: References to "City on the Edge of Forever" and "Little Green Men".

: President Harry S. Truman’s portrayal as an aggressive, paranoid leader.