in•fa•mous |ˈinfəməs| adj. 1. well known for some bad quality or deed : an infamous war criminal. 2. wicked; abominable : the medical council disqualified him for infamous misconduct.
New Oxford American Dictionary

Perhaps not the right word in this case. Hitler is infamous. Stalin is infamous. Bush and Cheney are infamous. The season finale of one of the better sci-fi shows in recent history is more of a melancholic event than an infamous one.