Smallville :

The will of Clark's biological father, Jor-El, informs Clark he must leave Smallville. Not wanting to leave his family and friends, Clark steals Lionel's copy of the spaceship key made out of refined green meteor rock and sticks it into the ship, destroying it. The blast from the explosion causes Martha to lose her baby. Grief stricken, Clark decides to leave Smallville.

Meanwhile, Clark and Lana agonize over a rift with Chloe. Lex and Helen finally get married, but uring his honeymoon flight, Lex wakes to find the plane going down and Helen and the pilot missing.