Steve Burns from "Blue's Clues" is "checking in" on his fans ... up for fans in a way everyone appreciated. "We just got a letter, wonder who it's from!" Well, it wasn't a letter, but it was ...

It’s time to play Blue’s Clues to figure out the mystery of the ... Sources also sent a letter confirming to Vulture the shows have been removed. Our last clue leads us to the Nickelodeon ...