When William is devirtualized, his card fills up instead of draining. Also, in "A Lack of Goodwill," he was wearing his Season 4 outfit when he dirvirtualized. However, in this episode William was wearing the clothing that he had on when he was virtualized in "Final Round."
William's father said that his son was expelled from his last school for "gluing stickers" all over the building and on the Principal's car windshield, but William himself said in the episode, "New Order" that he was expelled for putting up love letters/posters.
Jim: Ah, Mr. and Mrs. Dunbar. Hello, I'm really glad to meet you. You know that son of yours; he really is quite a piece of work.
William Clone: I'm not just any piece of work. To be specific, I'm a digitally generated random polymorphic energy field controlled by a basic non-evolving behavioral program.
Mrs. Dunbar: Is everything alright, darling? You seem to be a little out of sorts?
William Clone: That's right, but I never had any sorts to begin with.
Mr. Delmas: What's the matter, William? Didn't you hear me tell you to come in?
William Clone: I did, but the door wasn't open.
Jim: Didn't you hear me calling you, Dunbar?
William Clone: No. I'm sorry, but I don't have a phone.
Jeremie: Everyone to the factory!
Odd: What, right now? But they've got tuna casserole, sour kraut, and sausages for lunch today!
Ulrich: Einstein, a comedian? Hm. You were right to be worried about him. I don't think he's all there.
It is revealed that X.A.N.A. is a multi-agent system.
French Title: Retour
International air dates:
France: November 3, 2007
Mr. Dunbar reveals that William was expelled from his previous school because he glued stickers all over the school and the principal's windshield.
Before the episode aired, it was available in the video section of the Cartoon Network website until 2/18/08.
Jeremie is developing another multi-agent system that potentially has the power to destroy X.A.N.A.
While in a Super Computer area, Odd can use his shield ability, which covers most of his body.
This episode's title was listed as "Rescue" in the video section of the Cartoon Network website.
Along with the return of William's father, this episode marks the first appearance of his mother.
Odd: Open up, Grandma. It's Little Red Riding Hood!
Little Red Riding Hood is the central character from a popular fairy tale with the same name about a girl encountering a wolf while visiting her sick grandmother in the woods.