The saloon set featured in this episode is the same saloon set used for HBO's "Westworld".
Red-haired actresses: Tamara Mello, Wendy Phillips.
Harry Groener [Francisco Navarro], Antonio Jaramillo [Emmett Cook], Wendy Phillips [Joanna Percy], Eyal Podell [Ian Percy] and Brian Ames [Duncan] have all been on the series Charmed [1998-2006).
When Kirkland is printing out the information that Patrick has compiled on Red John he is seen drinking a Bloody Mary. This is the same drink that Jane has every year on the when he's at the restaurant during "Red Rover, Red Rover. (season 4 episode 23)