Jane attends an AA meeting on the episode "Jolly Red Elf." He's investigating the murder of a Santa Claus.
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Van Pelt and Rigsby are seen here. Where are they? At a Society of Authentic Santas convention, of course.
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At this Society of Authentic Santas convention, two Santas are fighting and Rigsby must break them up. Life can be tough for a CBI team member sometimes.
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Patrick Jane has an interesting case on his hand as The Mentalist moves toward Christmas: A Santa Claus turns up dead.
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The Mentalist Season 3 Episode 10 Quotes

Santa would smell like reindeer and chimneys. This man smells like cheap whiskey.

Jane

Jane: So you took the whole Santa revelation badly.
Lisbon: Crushed my heart like a cigarette.