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).
At the panel, McDorman and his Limitless costar Jennifer Carpenter â who plays FBI Agent Rebecca Harris â joined Sweeny in revealing some behind-the-scenes intel on the drama about a man who takes a designer drug to gain unlimited access to his memory and intelligence, making him the perfect consultant for the FBI.