Test of Time
Test of Time
Series The Grim Adventures of Billy & Mandy
Season 4
Production code 405
Writer Gord Zajac
Paul McEvoy
Broadcast information
Cartoon Network US Premiere October 15, 2004
Paired with A Kick in the Asgard
Five-O-Clock Shadows
Chronological information
The Nerve
A Kick in the Asgard
Test of Time is the 5th episode from season 4 of The Grim Adventures of Billy & Mandy.


When Billy forgets to do his history homework, Grim gives him a universal remote control to alter time and space so he can go back in time and finish his report. Then, Billy and Mandy travel to the American Revolution, to prehistoric times, and even to the future, where they meet an aged Billy who is just finishing the report. After a struggle for the remote, Billy ends up again in the Prehistory and the remote breaks. Then he and a cavegirl fall in love. Thus, Billy becomes a part of human evolution. Fast forward into the present, every person is dumb like he is and shares his dot eyes and characteristic big nose, including Mandy and Irwin.


  • Story by: Gord Zajac, Paul McEvoy
  • Storyboard by: Paul McEvoy
  • Art direction: Rae McCarson
  • Directed by: Shaun Cashman, Robert Alvarez, Brian Sheesley