Although Dr. Chase's team cannot "fix" Brett's condition, apparently they have created a ray that shrinks the crew for an infiltration mission into a mansion where something of value is hidden behind various defenses and its owners.
Turbo and his friends evade the Dark Rider in the American southwest. After dropping them off, Turbo crashes into a cave wall and loses his memory. He meets a group of reservation natives who try to help him regain his memory.
Various war machines from an arcade game come to life when Brett and his friends discover the game is a training program for a real planned invasion of Washington D.C.
Dark Rider captures Monique's father Dr. Fabro and his formula that can cause dogs to regress to their primitive state in his latest plan to capture Brett Matthews.
Twin items of rare historical antiquity near Bombay, and it is up to Brett and his friends to recover it before those who may use them unjustly can do the same.
Brett, Alex, and Pattie enter a cross-country race as cover while escorting a girl named Paula to court so that she can testify against a jewel thief called "The Dragon."
