Find out how Lindsey and Radzi got on with their Sport Relief Challenge. How many steps will they be able to add to the Mega Mileathon Totaliser? There's a sneak peek behind the scenes of Sport Relief. Plus Dako Flying Angels showcase their fantastic gymnastic display skills!

Warning, this is the most hair-raising and exciting episode of Blue Peter ever! Radzi conducts four million volts of electricity to shoot lightning bolts from his hands. Plus four motorbike riders race around the infamous Globe of Death, and we're joined by Henry Danger himself.