Patrick Jane's personal car is an early 1970s model Citroën DS, manufactured in France from 1955-1975, and sold in the USA from 1956-1972. The DS was the first mass production car to offer hydropneumatic self-leveling suspension with an option for the driver to manually raise or lower the chassis at the push of a button.
To date, Red John has never made an attack or directly influenced the events of any season premiere. He has attacked or acted in some way, shape, or form in every single season finale to date. In general, the season premieres deal with the repercussions of Red John's actions from the previous season's finale.
Every episode title, until episode 6.8, 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.