The team heads to Grand Rapids to investigate two ritualist murders on Criminal MInds. "Alchemy" is the 20th episode of the show's ninth season.
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The BAU team heads out when the opening of a time capsule unearths a crime on Criminal Minds. "Pay It Forward" is the 19th episode of the show's ninth season.
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Morgan's past comes back to haunt him when the BAU investigates a case in his hometown on Criminal Minds. "Restoration" is the 18th episode of the show's ninth season.
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The team heads off to investigate the death of people posting personal information on blogs on Criminal Minds. "The Gathering" is the 17th episode of the show's ninth season.
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The team tries to figure out if the Replicator has returned on Criminal Minds. "Carbon Copy" is the 16th episode of the show's ninth season.
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The team's stalker continues to get closer as they head to Austin to investigate on Criminal Minds.
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Hotch and Rossi interview a writer after his daughters disappear on the anniversary of his wife's disappearance on Criminal Minds. "All That Remains" is the 14th episode of the show's ninth season.
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The team is headed to San Francisco to investigate a string of murders on Criminal Minds. "Magnum Opus" is the 13th episode of the show's ninth season.
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Criminal Minds Quotes

Reid: Huh.
Morgan: What? You see something?
Reid: Encryption's a highly specialized skill set but it's fundamentally a mathematical process, which means the human process sometimes through technique can reveal where you learned it. I think I know where he learned how to do this.
Kate: Where?
Reid: Harvard. Which oddly enough isn't known for its advanced math program but it is known for one particular class. When you're good at math - good enough to get into Harvard - you take a math class called "Math 15". When you're better than that you take "Math 25", but when you're the best, the absolute best, you take "Math 55": Honors Advanced Calculus and Linear Algebra. Graduates are immediately employed by the U.S. Government because they're too dangerous to work anywhere else. More specifically, they're employed at the NSA.

Your memory is a monster. It summons with a will of its own. You think you have a memory but it has you - John Irving.

Hotch