Back home, Calder gets another call from the bomber. He blames Calder for the marked money, and threatens another attack. Assuming it will be directed at Calder personally, he deduces that the next target will be Revolution at Magic Mountain. The FBI rejects Calder's hypothesis, but decide to investigate anyway because the ride is scheduled to debut on July 4, when park attendance will be at its highest for the season. Agents disguised as park maintenance men eventually find a bomb attached to the tracks and disarm it.