There are Region B Germany, Scandinavian and Region free UK Blu-ray releases, all of which have a range of cast and crew interviews as extras. The Scandinavian version also has some B roll footage. Technical specifications are the same except for some language and subtitle options. There does not seem to be a Region A US version released at this time. The extras on the European releases are not extensive (the interviews on the UK version run approximately 15 minutes) but I guess there are some.