Steve Austin's former employer, Oscar Goldman, approaches him and asks for help; a band of terrorists he put out of business are back. Steve initially declines, but changes his mind when his son Michael Austin is severely injured as a result of his first solo flight. Rudy Wells operates on Michael, giving him better bionics than Steve's or Jaime's.

References:
https://en.wikipedia.org/wiki/The_Return_of_the_Six_Million_Dollar_Man_and_the_Bionic_Woman