Can only watch movies through picture in picture.

Question

I have an older (black) very large Panasonic television and recently I can only watch movies through the little picture in picture feature. And even they are seperated into two identical screens showing the same exact thing. I only use this television with my DVD player. My 5 year old son put in a s****. Doo movie and now this problem has occured. I'm guessing he set some feature on it. For the life of me, I can't get it back to normal. Please help!