We're watching NBC broadcast right now on a pair of rabbit-ears. That works fine for the popular events if you don't mind the delay.
As long as we're mentioning various grey-hat techniques to view content from the BBC and others without paying for it, there are sites like thefirstrow.eu that carry streams from the BBC and other international broadcasters. I'm not encouraging you to use those, but it is an interesting situation. NBC can't issue a DMCA takedown on those streams because they don't own that content. If the BBC has no interest in shutting down those streams, they may never be shut down.
As long as we're mentioning various grey-hat techniques to view content from the BBC and others without paying for it, there are sites like thefirstrow.eu that carry streams from the BBC and other international broadcasters. I'm not encouraging you to use those, but it is an interesting situation. NBC can't issue a DMCA takedown on those streams because they don't own that content. If the BBC has no interest in shutting down those streams, they may never be shut down.