‘9-1-1’: Oliver Stark Reveals Tommy’s Past Will Send Buck on a Downward Spiral

[Warning: The below contains MAJOR spoilers for 9-1-1 Season 8 Episode 5 “Masks.”]

9-1-1 celebrates Halloween in the way only it can: with hijinks, wild cases, and an emergency that hits way too close to home.

The good news: Hen (Aisha Hinds) and Karen’s (Tracie Thoms) son Denny (Declan Pratt) is going to be okay after getting pinned when a car hits him. Also in this episode, Buck (Oliver Stark) breaks out in boils after accidentally getting a real corpse for the 118’s Halloween festival.