3987 A.D is a year in the Cletus Comics storyline. In the year, Cletus, Inc. opened, releasing many Cletus units. (exept 1.
Trivia
- This is a year that hasn't come yet, so it is unknown how the main Cletus was made in 1981.
(Maybe after 3987 started the Robot Era, starting at year 1 and is currently going, thus having Cletus born in the new 1981).