A woman hires Magnum to carry out a plan to find her fiancé, which includes entering Hawaii's Iron Man triathlon.
Magnum is hired by a writer working on a biography of a reclusive inventor after her home is ransacked and her research stolen.
Philip and a young computer whiz, whose father (Conrad Janis) is Diana's prisoner, help the Resistance break into the Battlesphere.
A man with a plan lures Superman into turning an alloy into pure radium.