Star Trek II : The Wrath Of Khan

The second Star Trek Movie, The Wrath Of Khan, was about Captain Kirk facing an enemy from his past, Khan Noonien Singh. Khan was obsessed to possess Kirk's Genesis project weapon. In a dramatic finish, Khan's and Kirk's ships are both stuck in a nebula with engines offline. Khan has initiated the self destruct on the Genesis weapon. Spock bravely sacrifices his life to reactivate the warp engines, and save the Enterprise crew from the explosion. The Genesis weapon later turns the nebula into an unstable planet.