The letter-bomb murder of a Navy intelligence officer interrupts McGarrett's annual naval-reserve duty.
An armed, escaped convict (Charles Cioffi) holds badly wounded McGarrett hostage after their plane goes down in a severe storm.
McGarrett searches for a missing Englishman suspected of passing secrets to enemy agents; guests Juliet Mills, Dan O'Herlihy.
The Honolulu murder of a gambler sends Five-0 in pursuit of a Las Vegas courier; guests Susan Dey, Andrew Prine, Marc Singer.
A criminal plots to launch a Russian surface-to-air missile; guests John Colicos, George Takei.
McGarrett allows rebelling convicts, led by an old enemy (Harold Gould), to try him for murder in exchange for release of hostages.
Jack Lord
Det. Steve McGarrett
James MacArthur
Danny Williams
Kam Fong
Chin Ho
Al Harrington
Actor
Herman Wedemeyer