Firefox (1982)

A joint British-American plot is devised to steal a highly advanced Soviet fighter aircraft (MiG-31, NATO code name “Firefox”) which is capable of Mach 6 (hypersonic flight), is invisible to radar, and carries weapons controlled by thought. Former United States Air Force Major Mitchell Gant, a Vietnam veteran and former prisoner of war, infiltrates the Soviet Union, aided by his ability to speak Russian (due to his having had a Russian mother) and a network of Soviet dissidents, three of whom are key scientists working on the fighter itself. His goal is to steal the Firefox and fly it back to friendly territory for analysis.

However, the KGB has got wind of the operation and is already looking for Gant. It is only through the dissidents that Gant remains one step ahead of the KGB and reaches the air base at Bilyarsk, where the Firefox prototype is under heavy guard. The dissidents working on the Firefox help Gant infiltrate the base. Pyotr Baranovich, one of the scientists, briefs Gant on the operation of the aircraft but warns him that there is a second prototype in the hangar that must be destroyed. The diversion will allow Gant to enter the hangar and escape with the first Firefox.