FBI BAU Supervisory Special Agent Emily Prentiss was played by Paget Brewster. Her mother used to be an ambassador in various Arab and Eastern European countries. Therefore, she is fluent in Arabic and can speak some Russian and Spanish as well. In season 4, episode Cold Comfort it is revealed that Emily Prentiss was born on October 12, making her a Libra. She joins the BAU in season 2, upon the departure of Agent Greenaway (Lola Glaudini).
Regular PVC (polyvinyl chloride) is a common, strong but lightweight plastic used in construction. It is made softer and more flexible by the addition of plasticizers. If no plasticizers are added, it is known as uPVC (unplasticized polyvinyl chloride), rigid PVC, or vinyl siding in the U.S.
CPVC is also a thermoplastic that is molded into many of the same products as PVC. This difference in makeup allows CPVC to withstand a wider range of temperatures. This is why many building codes require the use of CPVC as opposed to PVC for use in hot water applications. The ASTM standard allows PVC to be used in applications not exceeding 140 degrees F.Temperatures over this can cause softening of the material and weakening of joints.