The Challenge is one of the longest-running reality TV shows, so it’s no wonder the show has a whole lot of history to unpack this January. Taking a look back at some of the cast’s most memorable moments, fans tune in to The Challenge Home Turf via YouTube and MTV. Some cast members reflect on times spent with former contestants of the show, including the late Diem Brown. Chris ‘CT’ Tamburello has become something of a The Challenge legend. The contestant has appeared on the MTV show since the early 2000s and he’s still competing as recently as season 37’s Spies, Lies & Allies. Now, fans get t…