Tv show downloads, already purchased, but will not download

I have two tv episodes that will not download. Here's the scenario. I purchased these, they begun to download. I can watch about 10 seconds of each one. Both say that there is not enough space on my iPhone 4 to download them. I can currently download other episodes of the same size with no issues. The stuck downloads are NOT in my videos folder. So I can't delete them. Please help!!