One of seventy-two experimental torpedoes given to the Enterprise by Admiral Marcus for a strike on Kronos, each of which secretly holds a member of Khan's crew in cryogenic sleep.
The advanced long-range torpedoes appear in the film Star Trek Into Darkness. Admiral Alexander Marcus loads seventy-two of them aboard the Enterprise and orders Kirk to fire them at Khan's hiding place on the Klingon homeworld. Their fuel compartments are shielded from scans, and Scott resigns rather than accept them.
When Khan surrenders on learning their number, Carol Marcus and McCoy open one on a deserted planetoid and find a cryotube inside, holding a man three hundred years old. Khan had hidden his people in the weapons he designed, and Marcus hoped to dispose of them and start a war at once.
Spock later has the sleepers removed and beams the armed torpedoes to the Vengeance, where they detonate and cripple the ship.