Season 4, Episode 9b
Episode name reference to/pun on:
Air date September 12, 2003
Production number 408b
Written by Clayton McKenzie Morrow
Storyboard by Clayton McKenzie Morrow
Directed by Robert Alvarez Chris Savino Paul Stec (Art director)
Bygone Errors is the second part of the 9th aired and 8th produced episode in season 4 of Dexter's Laboratory, which first aired on September 12, 2003. In this episode, Dexter and Dee Dee reminiscence about their past.
Old Man Dexter tells stories about what his life was like back when he was a kid but Old Gal Dee Dee is there to correct him.
One of Dexter's stories was a story of him being in an alien restaurant being chased by aliens. This may be a parody on .
Samurai Jack During that scene, Jim from the Powerpuff Girls episode "Mime for a Change" also makes a cameo appearance.
Although this episode along with "
Height Unseen" and " Folly Calls" aired on September 12, 2003, they were actually made in 2002 according to the credits.
These episodes completed production in November 2002.  This episode marks Old Man Dexter's and Number 12's last appearances in the show.