Adam and Jamie turn dirigible detectives to try and solve one of aeronautics biggest puzzles: did hydrogen really cause the Hindenburg fire? Meanwhile Kari, Tory and Grant come face-to-face — and have to flee — from some of Nature's natural-born killers. See what unfolds as they test the saying: "If you're being chased by a crocodile, run in a zig-zag, because crocs can't turn corners at speed."
