The travel velocity of these two wave types is not the same (P-waves are faster than S-waves). Thus, if there is an earthquake somewhere, the first waves that arrive are P-waves. In essence, the gap in P-wave and S-wave arrival gives a first estimate of the distance to the earthquake.
With the mysterious U.S. Senator Eddie Morra (Bradley Cooper) providing him with a second drug to counteract NZT's deadly side effects, Brian uses his enhanced abilities to help FBI agent Rebecca Harris (Jennifer Carpenter).
Kate Burton plays the scary, power-hungry vice-president on Scandal. She also played Meredith's scary mom on Grey's Anatomy, a senator in one episode of The West Wing, and has appeared as opposing counsel on a few episodes of The Good Wife. Scott Foley is the mysterious military guy who seduces and spies on Olivia.