A Test of Time

A Test of Time is the first segment of the third episode of season 3 of The Grim Adventures of Billy & Mandy.
== Plot ==
Coming soon!
== Characters ==
* Grim
* Billy
* Mandy
* Irwin
* Future Billy
* Unnamed cavewoman
== Locations ==
* Endsville Elementary School
* Billy's house
* Mandy's house
* Irwin's house
* Future Endsville
* Stone age
* American Revolution
== Trivia ==
* After Billy messes with human evolution, it is unknown what Grim's fate is.
* This is the only time in the series that Mandy is genuinely seen both laughing and smiling at the same time.
* Running gag: Mandy keeps on calling Billy pinhead.
* It is unknown how the dog and bird seen briefly at the end of the episode ended up with Billy's face, since it was implied that he only had babies with just the cavewoman.
* The beginning of the episode is implied to take place in the same timeline where everyone has Billy's face.
* By messing with evolution, Billy could've saved the entire world from being taken over by Mandy, since she herself doesn't seem to care about studying.
Category:Episodes
Category:Episodes focusing on Billy
Category:Episodes focusing on Mandy
Category:Season 3 episodes
Category:The Grim Adventures of Billy & Mandy episodes
Category:Episodes with funny endings
Category:Episodes with good endings
Category:Non-canon episodes
Category:Episodes with nightmare fuel