for him and meredith were desperate for any lead on his whereabouts. and it they were about to get one. >> i answered my cell phone and i heard his voice. couldn't believe it. coming up -- a trap is set to lure gary hilton from his hiding spot. >> i was trying to play it cool. >> and a dramatic new lead. could it lead police to meredith? >> she could be alive, and we just can't let up. seresto, seresto, seresto.