9-1-1S4, E1
The New Abnormal
When the Hollywood Reservoir Dam breaks, the 118 must race into action as a mudslide causes mass chaos and threatens a world-famous landmark. Meanwhile, Athena is determined to put her physical and emotional injuries behind her and return to active duty. Maddie and Chimney prepare for the birth of their baby. Hen begins medical school and Buck uncovers a shocking family secret.
