Elijah Nelson

After pulling a double shift, Mario risks his own life when he follows Willis to a construction site where two brothers are trapped on a crane 300 feet above the ground. Also, Leanne treats the wife of an orthopedist from Angels Memorial who is brought into the ER with mysterious injuries.

In order to impress the other moms at school, Katie, Taylor and Oliver travel to New York to track down Nathan Fillion at a "Firefly" convention, so Katie can convince him to attend the school's spring gala.

Burt encourages Jimmy to be more of a daredevil. So when Jimmy’s co-worker, Frank, invites him to a house party, Jimmy jumps at the chance to unleash his bolder side. As Jimmy and his new pal spend more time together, they discover they shared a common high school bully. In a series of flashbacks, Jimmy and Frank look back at their unhappy high school years as Young Jimmy (guest star Greyson Chance) and Young Frank. But when the two try to take down their old nemesis, they’re surprised to learn that the bully has changed.