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Prepare to meet Finn’s daddy! Who is this mystery man? And why is he locked in a cosmic prison? We’ll find out soon enough! Adventure Time returns with a big-daddy half-hour event April 21 at 6/5c.
What will Finn’s dad be like?[cnce src="http://www.cartoonnetwork.com/forums/communityjs/780?forum=52&key=ca7UV7&threadID=125005" ]