Episode Title:Old Flame / Don't Be a Hero / My Favorite Martian.Episode Description:Old Flame: When Dexter brings the caveman who first discovered fire back from the past, the caveman acts like Dee Dee and starts smashing the lab.
Don't Be a Hero: Dexter turns himself into a superhero, but he gives up after every power he tries backfires.
My Favorite Martian: Dexter travels to Mars to find intelligent life, unaware that Dee Dee has stowed away in his space capsule. After Dee Dee gets covered in red dirt, Dexter mistakes her for a real-life Martian.