Big Hero 62014

Hiro:
It's over, Krei.

[Without his mask, Yokai stands up and turns around to Hiro, revealing he is Callaghan]

Hiro:
[shocked] P-Professor Callaghan? The explosion... you died.

Robert Callaghan:
No. I had your microbots.

[a flashback shows Callaghan using Hiro's microbots to protect himself from the fire earlier in the film]

Hiro:
But... Tadashi... You just let him die...

Robert Callaghan:
Give me the mask, Hiro.

Hiro:
He went in there to SAVE you!

Robert Callaghan:
That was HIS mistake!

[Baymax comes over to Hiro, who is feeling betrayed and angry]

Hiro:
[indicating Callaghan, darkly] Baymax... destroy!

[Callaghan looks at Baymax and Hiro, horrified]

Baymax:
My programming prevents me from injuring a human being.

Hiro:
Not anymore.

[Hiro opens Baymax's access port, removing Tadashi's health care disc and leaving only the fighting disc]

Baymax:
Hiro, this is not what...

[Hiro slams the access port closed, Baymax's eyes turn red]

Hiro:
Do it, Baymax! Destroy him!