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When [[Charlie Bradbury]] is given [[Frank Devereaux]]'s hard drive to hack, she finds a file on Leviathan's and learns what borax will do to them. After witnessing the Leviathan [[Tarrell]] shapeshift and eat her superior, [[Pete]], Charlie flees to her apartment where she is met by Sam and Dean. To prove to her that they are not Leviathans, they pour borax onto their arms, assuages Charlie's fear when they do not begin to burn. Dean in turn, pours borax on Charlie's hand to prove that she is human.
[[File:LeviBorax2.jpg|thumb|right|350px|Effects of the borax bomb on a [[Leviathan]].]]
Learning that Dick is having a package delivered from a excavation site in Iran, and will have 42 minutes to intercept the package at the airport. Sam, Dean and Charlie formulate a plan, and successfully switch out the briefcase with one containing a bottle of Power Clean rigged with explosives, creating a borax bomb. When Dick receives the briefcase and opens it, his look of self-satisfaction quickly turns to confusion as the borax bomb counts down and explodes. The explosion causes a Leviathan
bodyguard to have the lower portion of his face to melt, lying prone on the floor, Dick casually walks over him, with burns on his face orders the building locked down. With Charlie trapped in the building Pete begins stomping towards, but is knocked down by Bobby who inadvertently sends him into Charlie, breaking her arm. Sam and Dean proceed to crash through the glass doors, and upon Charlie telling them Pete is a Leviathan, Dean throws a jar of borax into his face, causing him to collapse in pain ..
===[[7.22 There Will Be Blood]]===