Six ways to catch TV shows online
This article on Lifehacker.com lists a bunch of different ways to catch various TV episodes online for free. Since the name of the site involves the word "hacker", one can assume that some of these methods may not be entirely legal. Repeat at your own risk.
As someone who doesn't own any kind of recording device for the TV but has a great computer monitor, I tend to go to the network websites to catch episodes of certain shows. I'd hate to miss a week of Heroes or Bionic Woman and I'm glad the networks offer a chance to watch missed episodes online at one's leisure with minimal commercial interruption.Of course, there are some cases of television programs that are on channels that aren't offered (for example, my cable company doesn't offer BBC America. Jerks) and aren't available online. If that is the case with you, I recommend doing a Google search on the word "torrent'. But you didn't hear that from me.