“Masks,” the fifth episode of 9-1-1 Season 8, which saw the 118 experience a pretty intense Halloween like never before, nearly gave viewers a scare when Hen (Aisha Hinds) and Karen’s (Tracie Thoms) son Denny (Declan Pratt) got pinned to a house by a swerving car. Also, there was that situation with Buck (Oliver Stark), who broke out in boils after unintentionally getting a real corpse for the team’s Halloween festival. The episode, like many others, will surely not be easily forgotten as fans look forward to the upcoming episode.