Spectra is using Bigfoot to keep people from getting too close to their latest base in Tibet. They are working on the "Inter-Frequency Disruptor", which affects ships guidance systems, causing them to crash. Keyop takes off for Tibet on his own and is captured by Spectra. He must lead G-Force to the Spectra base and escape before it's destroyed by G-Force. Zoltar is unmasked in this episode! (thetvdb.com)