Tonight while we get ready to welcome famed "Star Trek" writer David Gerrold, we'll also be revealing who our very, very, very special guest will be in July.No, we're not going to come out and tell you. Instead, we're going to give you an opportunity to guess.Throughout the show May 21, we'll give a clue that will be accompanied by a little sounder that we'll demonstrate on the show tonight. After our special guest, we'll give you a chance to call in with your guess at 646-200-3642, and the first person to get it right will win a special DVD prize!You're going to love who this guest is, so make sure you tune in tonight at 10 p.m. ET/7 p.m. at BlogTalkRadio.com/SyFyRadio!