*CBBC tie-in *Videos, competitions and more *Gross facts, quizzes and online activity
Dr Chris and Xand van Tulleken grew up in London and trained in medicine at Oxford University, graduating in 2002. They have combined NHS work with global health work and television appearing in Blizzard: Race to the Pole, Medicine Men and Medicine Men Go Wild, and in January 2014 appeared on Horizon. Operation Ouch! is their first series for children.