Spiral Zone(1987)

While the Riders prepare to take out a zone generator that is blocking San Francisco harbor, Bandit infiltrates their base and tricks Hiro into accepting a hypnotic device disguised as a holographic computer game.

The Zone Riders rescue King Donovan, a retired military pilot and Dirk's former CO, as he is being pursued out of the zone. He has details on an Overlord plot to increase the size of the zone by hooking a generator up to the Hoover Dam, and a plan to stop it. But instead of allowing them to sneak up on the generator, the suggested rout leads the Raiders into an ambush, and King ends up suspected of treason.

The Black Widows slips a miniature zone pod into McFarlands clothes, activating it inside the MCC while the Zone Riders are on a mission. Forced to go up against their own defenses and Overlord at the same time, the Riders have one hour to take out the pod before a UN ordered air strike reduces the place to rubble.

The Zone Riders bring a scientist to Miami, looking for a possible cure to the zone bacteria in the form of a local plant. Dirk also hopes to find an old friend who was in the area during the zone attack.

The extreme weather is slowly flooding San Juan, while making airborne evacuation impossible. The only route of escape is through the zone, but can the Riders take out the generator in time?

An unactivated zone generator, found in Katerina's hometown, could provide the first and only opportunity to study the zone release mechanism. Well aware of this, Overlord is determined to keep it out of the Riders hands.

In this episode we discover Overlord's romantic side. The Zone Raides find the woman he was in love before he entered the take-over-the-world business. Using her as bait the riders set a trap to capture the leader of the Black Widows. Dashing out of the Zone in shining armour Overlord goes to rescue his love, but he doen't have only romance in mind.

A train carrying scientists reseaching the Spiral Zone to a conference is routed by the Black Widows into the Zone. The Zone Riders are dispatched to stop the train from reaching a power plant within the zone; however things go from bad to worse when Tank's suit fails and he becomes a Zoner and is ordered by Dutchess Dire to stop his colleagues.