How Could NBC Cancel "Undercovers"?

I'm back from my blogging break and I just had to comment about NBC canceling one of my favorite shows.Undercovers was a great show full of drama, comedy and action. It was like a mini movie every Wednesday. The show had great actors and a great plot. If rating were the problem then why not move it to one of there other other networks like USA or to a different night.How can crappy reality shows