TV shows can start off with brilliant first seasons then take a downward slide. Sometimes, it can't really be explained why it went downhill. It just never seems to capture the same magic as its premiere season. Other times, we can blame random casting changes, new writers, poor timing, or a totally ridiculous plot line. For many a reason, these 17 TV shows with good first seasons let us down as time went on. Frankly, we don't know how some of them made it beyond season two.