When Shows I Watch Get Cancelled

Two television shows that I've been watching this season have received the ax -- The Last Resort and 666 Park Avenue.  It's always disappointing when you invest time in a TV program only to have the rug pulled out from under you when the network decides to pull the plug because the ratings are too low. 

Even a hit series, such as Revolution, is not immune to the fickle finger of the executives who program the schedule -- the popular new show is going on hiatus for a few months.  Will that hurt the serialized science fiction drama's viewership?

What are your favorite shows that bit the dust too soon?