Dr Chris and Dr Xand are with the top experts on the planet to show you more things that will blow your mind. In this episode, Neptune's skipper Ragi has a difficult time docking at the iceberg. Also, much to Chris Packham's delight, we encounter the biggest, scariest, most awe-inspiring land predator in the natural world - the polar bear. Explorer Andy Torbet is first to set foot on the mega-berg, with surprising consequences! Show less