As the closing act arrives, it's hard not to wonder if Carlsen has another 11th-hour pivot in store. After a fashion, he does – but rather than a cathartic twist, it's more a cunning reconfiguration. Here, Cocoon breaks its own carefully established rules in a way that doesn't so much smack you in the face as lead to a realisation of its giddying implications, before you're afforded the opportunity to harness some of that potential. Not all, however: there are possibilities left unexplored, albeit for reasons that seem ever more apparent the longer you consider them. It leaves you instead with a reward of a different kind, courtesy of a playful tribute to an unlikely cinematic inspiration – one last delightful surprise beyond its final door