Plot: On tonight's Daily Planet we journey onto the set of a film that's using science to bring fantasy to life, and then it's full-steam ahead as we check out a gigantic model train. Plus, on the Allan Nursall Experience Allan gives us the science behind hot rod welding, on Trending we fetch a story about a robotic dog that's getting an upgrade, Ziya checks in with a scientist who says when it comes to sharks smoothness doesn't equal speed, and we've got the answers and winners to this week's Mindbender quiz