Project Dee Dee is the third part of episode 21, which first aired on December 3, 1997. In this episode, Dee Dee tries to come up with a science project. Dexter hears about this and wants to help her.
For a couple of frames Dexter and Dee Dee are seen running away on foot,yet --in the last frames before the end of the episode,--they're riding inside Dee Dee's rubberband car.
Production Notes
Although this episode is aired on 1997, it was made in the same year according to the credits.
Airing
This is the last episode to have premiered in 1997.