"Countdown" story unfolds
The Japanese pilot rescued from the yacht incident causes a disruption, as he grabs a gun, kills his guards and holds the other survivors. He demands a radio.
Since Nimitz was a living American military official in 1941, Chapman's claim is dismissed out of hand.
The Katherine Ross character is "Laurel," the personal assistant to Senator Chapman. She and "Commander Owens" begin getting romantically attracted. Yelland sends the civilians with supplies to an isolated Hawaiian island. "Commander Owens" goes with, and the aroused and angry Senator Chapman tries to hijack the helicopter with a flare gun. The helicopter is destroyed and Chapman is killed.
A "dog movie" (not quite)
I say "whew" upon finishing the plot description, as it's involved. Ebert noticed the same and used the word "mess." He concluded that the carrier was the chief "star" of the movie. (I'm reminded of a review of the WWII movie "The Bridge at Remagen" that stated the bridge was the main star.)
Signature lines from "Tora! Tora! Tora!":
"You must mean the Philippines."
"No, it's Pearl!"
Early Monday morning, December 8, 1941. I turned on the radio to listen to the usual news hour. Unbelievable! What was I hearing? The newscaster blared out details of the Pearl Harbor devastation! I stood stock still, petrified with fear, forgetting how tight I was holding our six-month-old son, until he cried. Fear and weakness overcame me as I sank into a chair to hear more.