Sorry, you never delete your TV.com account but, there is good news here, you can either anonymize it.
TV.com don’t allow users to delete their account, rather they bring out option to anonymize it.
According to their article on here: http://www.tv.com/tv-com-technical-support-board/how-do-you-delete-your-tv-com-account/topic/73856-238549/msgs.html, they made us understand that an account owned with them can never been deleted but can be anonymize.
Sorry that you dont meet to get your mind wanting positive answer. you can contact TV.com on their site, just login to Tv.com
Thanks for reading