What's the name of the episode of Bones where Zach goes crazy?

Where they catch him?What's the name of the episode of Bones where Zach goes crazy?
The Pain in the Heart. It was the last episode of season 3. After the explosion in the lab which sends Zack to hospital, Boothe and Brennan notice the silver skeleton is missing. All the employees of the lab become suspects of being Gormogon' apprentice. They pursue the investigation and realize that Zack is the one. He is confronted in the hospital and confesses.What's the name of the episode of Bones where Zach goes crazy?
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