Patrick Jane and the CBI team investigate the death of a mathematical genius by a gun-wielding clown.

original airdate- May 6,2010                          rating-14.85 million

song--The Main Title Theme--(Extended Version) by Blake Neely

Now You Know--Every episode title contains a reference to the color red, like "Paint it Red", "Scarlett Fever", "Russet Potatoes", or "Bloodshot". This is because Patrick Jane's nemesis is the ingenious sadistic serial killer, Red John.