Caption: "Code: Zero, zero, zero. Destruct. Zero."
Caption: 60-second countdown initiated
Caption: Enterprise self-destructs
Computer program aboard starships for destruction of the vessel, should the ship be captured or controlled by an enemy. Time until auto destruct is sixty seconds.
On Galaxy-class starships, for example, activation of the program requires verbal orders and handprint verification from the two most senior command officers of the ship.