From the Showtime Network a DVD Boxset of Dexter. Season 1.

An interesting and original idea that's very skillfully executed, Showtime's Dexter is compelling and sometimes thoroughly riveting.  Creator-executive producer James Manos Jr.'s title character, one Dexter Morgan (played by Michael C. Hall of Six Feet Under renown), works for the Miami Police Department as an blood spatter analyst, visiting crime scenes and helping figure out what happened. He has an avocation, too: during his off hours, he tracks down some very, very bad people who for various reasons have eluded the proper authorities. Seems his adoptive father, a cop himself, taught the kid how to channel his dark side in a "positive" direction; and so, having captured these evildoers (including a child molester-murderer and a recidivist drunk driver with a trail of bodies in his wake), Dex dispatches them with clinical precision, thus making him a serial killer who snuffs serial killers. But there's more--much more, as it turns out.