The End of Time

The Krashoks commissioned the Darksmith Collective to fashion a device that creates life. The Krashoks, after waiting for centuries, have finally had their contract fulfilled. They intend to detonate the Eternity Crystal unless the Tenth Doctor can stop them. To make matters worse, Gisella is trapped on the Krashoks' ship. Can the Doctor save Gisella and destroy the Eternity Crystal once and for all?