You can stream the latest episode of Doctor Who, Nightmare in Silver, at Doctor Who Media with the following links. These links are also compatible with your iDevices and a lot of other mobile devices. I performed some maintenance on it a week ago, and now it works much better than before, (Though be aware, with more than a hundred people on, it can still go down)

Standard Definition
High Definition

Please be aware that as usual, the site is register only.