I have made contact with three different cable networks on a reality show I have created (idea only). All three networks would like to have a proposal sent. I want to protect my idea and submission. Is there a certain form/wording that I can use to protect my idea?

It may be wise to have your specific factual situation analyzed by an attorney in your jurisdiction. And you should have this done IMMEDIATELY so that you don't lose important rights. Many lawyers offer a free or low-cost initial consultation just for the purpose of determining whether they can help you. Don't be afraid to contact them. Our Lead Counsel Panels at http://www.lawinfo.com/law/ are a great way to find a lawyer in your area on the internet. In your case you need an Intellectual Property Attorney. Best of luck!