This The Mentalist screencap contains
beech, beech tree, ponderosa, ponderosa pine, western yellow pine, bull pine, pinus ponderosa, and tree.
There might also be
olive, european olive tree, olea europaea, birch, birch tree, cedar, and cedar tree.
Jane discovers an important clue to Red John's methods as the team encounters four of the suspects, and the CBI investigates the case of a software engineer killed by a drone strike