Nelson Lau is a little like Clark Kent. He’s a successful doctor, but is also supremely creative and has a whole other identity as a photographer and film maker. He has hung out with the King of Swaziland, treated survivors of crocodile attacks in Darwin and lived to tell the tale of the toughest teacher in his Hong Kong kindergarten. We chat on The Dialogue about his work in telemedicine, his film project “One Less God” and his beautiful exhibition “Timeless”, part of the Head On Photo Festival, on show at The Rocks Discovery Museum until 3 July.