Happy Feet Two continues the CGI saga of Mumble the tap-dancing penguin - voiced by Elijah Wood - by giving him a son who doesn’t want to dance. But that becomes a secondary issue once a glacial catastrophe separates them from the rest of their Antarctic colony. Introducing a few intriguing new characters – a puffin named Sven, who promises salvation through flight, and a particularly ambitious krill, whose existential crisis sends him on a quest for purpose under the ice shelf – it may sound crazy, yet it all builds to a spectacular and moving payoff.