 On Tracy Island, Brains identifies Olsen's machine as a Cham-Cham, an ultrasonically-sensitive computer that Olsen is using to send coded radio transmissions.Jeff relays this information to Washington, D.C., but the Matthews Field commander is sceptical and refuses to postpone the next shipment.That night, the Cass Carnaby Five begin performing Olsen's latest arrangement of "Dangerous Game".