Susan "Mandark" Astronomanov is the main antagonist in Dexter's Laboratory. He is Dexter's rival and later mortal nemesis who often seeks to destroy both Dexter and his lab to prove once and for all that he is the superior genius.
Mandark Astronomonov has been suggested to play 141 roles. Click below to see other actors suggested for each role, and vote for who you think would play the role best.
