Earthport One is the brainchild of Greg Masterson, genius engineer and self-made milionaire, with the space station the first call for commercial space tourism. Using the cover of the film studio, Straker and Foster are given a tour by Masterson but the fact some areas are prohibited and off-limits raises suspicions. Straker contacts the military, whose evasiveness confirms they may have involvement in the project. Three UFOs are detected, and two are destroyed by Interceptors. The third makes for Earthport One, and is shot at by concealed missiles from the station before the Interceptors finish the job.