Knight Industries tracks down a Bonnie and Clyde-esque couple and find that their true identites will affect a congressional race. Meanwhile, Mike and KITT must find a way to save Agent Rivai.

A deranged terrorist has kidnapped a foreign ambassador, sending Michael and KITT out to the rescue. Elsewhere, a damaged robot has Dr. Graiman and Sarah teaming up to repair it.

When a plane transporting a 10-year-old federal witness crashes, Mike determines that the accident was faked and that the boy was kidnapped. He clashes with the investigating DEA Agent, who promptly arrests him for interfering with the case. Meanwhile, Sarah fights for more authority over the SSC's future endeavors.

Mike and KITT must find a stolen serum which will result in the recipients maximum physicality when used, before it lands into the wrong hands. Meanwhile, Sarah's new duties have her overwhelmed as she quickly learns what it will take to re-institute the Foundation for Law and Government.