9-1-1
6 p.m. on 76; 9 p.m. on 7 22
After Maddie (Jennifer Love Hewitt) reveals a painful family secret, her admission prompts Buck (Oliver Stark) to reconsider his childhood for clues to why he is now a reckless daredevil in the new episode “Buck Begins.” Back in the workplace, the 118 team races to save some workers who have gotten trapped in a five-alarm factory fire. Gregory Harrison and Dee Wallace guest star; Angela Bassett and Peter Krause also star.