The death of a young botanist leads the team into the lucrative world of medical marijuana, while Cho’s work with the rapid response team brings him back into contact with Summer.

The CBI team heads out to a run-down Wild West tourist town to investigate the death of the town's owner. Meanwhile, Kirkland tries to uncover the extent of Jane's knowledge about Red John.

Jane and the FBI investigate the murder of a high-tech cartographer who may have unearthed a spy ring before his death. Meanwhile, Rigsby and Van Pelt find themselves on the trail of an alarming conspiracy.

A chance encounter with a suspicious-looking individual leads Jane and Lisbon to uncover a vast human smuggling ring. Meanwhile, Lisbon remains tempted by Pike’s offer to move to D.C. with him.