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Mandark Astronomanov, a new student at Dexter's school, seems to be superior to Dexter academically. Mandark forces Dexter to shut down his lab so that Mandark's lab can gain more power. However, with the help of Dee Dee, Dexter manages to destroy Mandark's lab.
First Air Date : Apr 28, 1996
Last Air date : Nov 20, 2003
Episode : 221 Episode
Season : 4 Season
Runtime: 7:14 minutes
Studio: Cartoon Network
Country: United States of America