Amazon have released the first two episodes of The Man in the High Castle for free. Whilst you will need an Amazon Prime account to see the full season when it is released on 20 November, you can watch the first two episodes completely free for this weekend.
The Man in the High Castle is based on Philip K. Dick's classic novel of the same name, in which the Germans and Japanese won World War II and occupied the North American continent. Twenty years later, the two former allies are now rivals and an increasingly frosty cold war between the two is in danger of turning hot. Meanwhile, a burgeoning resistance movement is bolstered by the discover of news footage which shows a different outcome to the conflict.
The first episode was a huge success when released earlier this year as part of Amazon's pilot project, getting the largest audience, the strongest critical acclaim and the largest number of votes in the project's history.
ETA: Apparently there are regional restrictions (for Amazon's own content, for some reason) and you need to install a Silverlight plugin to make it work.