Tyler Perez

After a volcanic eruption wreaks havoc in Austin, the members of the 126 race to save lives at a college pool party.

Elliot fears the worst after hearing the testimony by Detective Gomez's wife at his malpractice trial; Rox tries to connect with Willis, but he pushes her away; Leanne attempts to comfort Ariel in the wake of a devastating loss.

While rescuing an injured firefighter, Rox is hit by a drunken driver; Willis begins to realize his feelings for Rox; Leanne is excited to tell Ariel good news about her adoption.

Willis and Rox arrive at a road-rage accident that has caused multiple serious injuries; Elliot doubts his ability as a doctor when he's sued for his role in the death of the SWAT officer involved in the drug bust-turned-shootout.

Jesse is in denial when his brother arrives at Angels Memorial in bad shape after being pinned down in a warehouse collapse; further tests reveal he has advanced congestive heart failure; Willis opens up to Rox about his brother's death.

Mario joins Rox and Willis on the scene of a boat crash; Leanne works to save a brother and sister who drank boiling water through a straw as part of a challenge; Max's father tells Leanne to keep Ariel away from his son.