Clark hears the voice of his biological mother, Lara, calling for help from Kara's crystal and decides to release her, despite Jor-El's warnings. Lara and Clark reunite and she gives him Jor-El's ring, which contains blue kryptonite. As Clark puts it on, her realizes Zor-El manipulated the whole thing and that blue kryptonite strips him of his powers, enabling Zor-El to take control of the Fortress of Solitude. Meanwhile, Chloe and Lex each discover Lois and Grant have been seeing each other and warn them to stop. Written by
Did You Know?
In the comics, blue kryptonite simply negated the effects of green kryptonite it didn't have any adverse affect on Superman. See more
You're worried I'll discover the darkness you're concealing. Don't let it overpower the goodness. You must fight it.
References Raging Bull