Spiral Zone

Mission Into Evil (1x4)

Air date: Sep 24, 1987

A cargo plane en route to M.C.C. carrying the world's last supply of Neutron-90 is shot down by Overlord over the New York Zone. Now, it's up to the Zone Riders to recover the Neutron-90 (and the pilot of the cargo plane) before Overlord finds it and creates a weapon that would render the existing Zone Riders' suits useless.