Hmm, Supernatural is pretty cool, the first season's good, but it gets great after that. pretty much, and action/comedy with demons, werewolves and the like.
Burn Notice is good too, plus you may learn something (about explosives, torture, espionage, that kinda stuff). I'm not sure if everything they say is true, but the most of the stuff I know about they seemed to know how it works.
Also, Dr Who was good, but I haven't seen the new series yet, so I can't comment on the new Dr.