Teen Titans: "Mother May Eye"
Probably one of the WEIRDEST episodes of the show, unfortunately wasn't the good kind of weird. This episode had a great concept for a villain and some great moments with the Hive 5 villain kids.
But ultimately it just was a very "dry" episode with constant zombie/motherly love stuff. Although the ending is probably one of the smartest ending they've ever had for a Teen Titans episode. This really is a great series
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EDIT
Btw, Teen Titans also happens to be the source of my signature quote.