If you have Netflix you can stream it, that's how I've been watching it. I think they technically have a lot of the older stuff too, but just start with the series that is listed for 2005.
And as others have said, very British, the effects of the first season might throw you off, but trust me it gets better, and the writing starts of great and proceeds to get even better, so definitely worth a look.
And as others have said, very British, the effects of the first season might throw you off, but trust me it gets better, and the writing starts of great and proceeds to get even better, so definitely worth a look.