The Super Hero Squad Show

Enter: Dormammu! (1x5)

Air date: Oct 10, 2009

With supernatural wackiness plaguing the city, the Super Hero Squad enlists the help of the Sorcerer Supreme of the Earth dimension, Doctor Strange. However, the good doctor seems to be "off his rocker," babbling incoherently and summoning the Dread Dormammu to Super Hero City.