Deadly Women - Obsession

I just found out where this is available for legal download. I still can't figure out why Discovery Channel/Investigation Discovery doesn't just sell the darn DVD's. This will be the first time I've ever purchased a television show like this. I've got my fingers crossed that this is going to work. I didn't realize that my show hadn't downloaded completely and I started watching it....the vocals aren't in sync with the picture. I hope once the download completes that situation will be remedied. It would be so much easier if I could simply buy the darn DVD's at the channel's store. They sell other DVD's & T-shirts why not this show?