Remember in 2002 when Steve from Blue's Clues suddenly left the show to 'go to college' and had his brother Joe take over for him? Some of us had moved onto more mature television by then, like SpongeBob Squarepants , but the younger millennials likely remember the heartache they felt as Steve walked out that door and never came back. Well, after 25 years of Blue's Clues , Steve has returned with a wholesome message for all the grown-up Blue fans out there, and yes, we're crying. So about that …