In Die Hard Hans Gruber and his associates take Nakatomi Plaza hostage in hopes of stealing $640 million in bonds. Hans needs a code key password from Mr. Takagi to easily access the vault.

Mr. Takagi repeatedly tells Hans that he just doesn't know it:

Takagi: I don't have that code. You broke in here to access our computer? Any information you could get... ..when they wake up in Tokyo, they'll change it. You won't be able to blackmail our executives...

Gruber: Sit... down! Mr Takagi, I'm really not interested in your computer. But I need the code key... ..because I am interested in the $640 million... ..in negotiable bearer bonds that you have locked in your vault... ..and the computer controls the vault.

Takagi: You want money? What kind of terrorists are you?

Gruber: Who said we were terrorists? The bonds represent, at most... ..10 days' operating capital for your parent organisation. It's really no more than a temporary inconvenience. Now... ..the code, please.

Takagi: It's useless to you. There are seven safeguards on our vault and the code key's only one of them. You'll never get it open.

Gruber: Then there's no reason not to tell it to us.

Gruber: It's a very nice suit, Mr Takagi. It would be a shame to ruin it. I'm going to count to three. There will not be a four. Give me the code. One,... ..two,...

• ..three,...

Takagi: - I don't know it. Get on a jet to Tokyo and ask the chairman. You're just gonna have to kill me.

Gruber: OK.

Is there any evidence that Mr.Takagi knew the code key? Mr. Takagi is almost arrogant when he tells Hans that he is going to have to kill him. Was Mr. Takagi already aware that Gruber would kill him whether he told him or not?