000 Cocoon This 2-hour movie first aired on September 20, 1968, and introduced us 138 Secret Witness A young man is an eyewitness to a murder and finds himself
1. "138 Secret Witness A young man is an eyewitness to a murder and finds himself and his family the object of a hunt by the killer."
2. "161 Small Witness, Large Crime The arrest of a young boy who was witness to a murder sparks friction between McGarrett and a female deputy public defender."
3. "188 A Killer Grows Wings Criminals threaten to destroy the entire Hawaiian sugar cane industry by using imported larvae of a strain of moth for which there is no known insecticide or natural enemy."
4. "198 Heads, Youre Dead FiveO searches for a trio of mutineermurderers after the owners and crew of a boat partaking in a race from California to Hawaii are found dead."