dollars, an actual centrifuge, thirty-eight feet in diameter, which spins on its axis at a maximum speed of three miles an hour. The centrifuge is big enough so that the astronauts in the film, played by Keir Dullea and Gary Lockwood, have plenty of room to move around inside of it. In order to direct them while they were inside, Kubrick installed a closed circuit television system which enabled him to monitor the activities in the space ship from the floor of the studio. During the shooting of these sequences the MGM studio, with the whirling centrifuge, cameras, television sets, flashing lights and microphones looked a little like a launch pad at Cape Kennedy. Production activities were so complex that a special four man operations room was set up to co-ordinate the activities of the 106 man production unit.