It is not easy being a first responder, and it is even tougher playing one on screen. But for Oliver Stark, playing a firefighter/emergency responder on 9-1-1 is just another day at work. His character, Evan ‘Buck’ Buckley, referred to as Buck, is as complex as they come. While on one hand, he is rescuing people stuck on roller coasters and putting out fires, on the other, he is battling his own personal demons, including a complicated relationship with an older woman named Abby Clark (played by Connie Britton).