Good Old Sheldon My Life as a Teenage Robot : Season 3 Episode 14
TV-Y7-FV Nicktoons 23m int(0)
Aired: November 15th, 2008 @ 7:00 PM EST on Nicktoons
Turns out, poor Sheldon was stuck on the aliens' ship when Jenny got rid of it (in the previous episode), and he's been spending decades trying to get back to Earth (even though it's only been a short time on Earth since he left). Hopefully, Jenny can get him back to his proper age.