Smallville | Episode 150 – ‘Salvation’
Summary: May 14, 2010 - Zod appears to Lois claiming to be The Blur and accusing Clark of trying to reveal Zod's secret. Tess confronts Zod at the Fortress, in an effort to save Clark, but Zod gets the upper hand and uses his heat vision to burn her and leave her for dead before destroying the main console of the Fortress. Clark takes Tess to the hospital, where she tells him there is a second console that will activate the book. Later, Tess is pronounced dead at the hospital. Zod attacks Lois when she discovers he is not the Blur, but Clark saves her and reveals his true identity to her through a kiss. Zod's troops learn of his deceptive actions and agree to follow Clark to their new home through the Book of Rao. Zod uses a blue kryptonite dagger to make him and Clark human, and keep them from ascending. Clark intentionally stabs himself with it and falls off the roof of a building, leaving Zod without its protection and forcing him to ascend with the others off Earth.