Ahead of the much anticipated Crystal Maze reboot tonight, you can catch another one-off special for Stand Up To Cancer at 8pm. It will see four of the gifted youngsters from Child Genius take on a team of Channel 4's finest celebrity minds, made up of Alan Carr, Rachel Riley, Krishnan Guru-Murthy and Aisling Bea. We don't fancy the celebs chances, but it should make for an entertaining watch.