Like its Emmy-winning first season finale, House's second season finale gives viewers a closer look into the mind of Dr. Gregory House. As always, if you plan to see the episode yourself, read no further, spoilers ahead.
The husband of a former patient who has since committed suicide shoots House in the name of revenge. Miraculously, both House and his assailant survive. In fact, Cuddy and Wilson authorize a surgery that allows House to walk without assistance. Unfortunately, the operation also affects his ability to think. With hallucinations as a side effect, House begins to wonder what's real and what's imagined.
This series is definitely worth DVD (though the Season One set has no commentaries and only a few featurettes as extras).