The Hammer - S6-E2
Revealing mistake: When Bradford is fighting The Hammer, you can plainly see it's a stunt double for Tim whenever he is thrown over a table or into the wall.
Revelations - S3-E6
Continuity mistake: When Nolan is asking for advice from his ethics teacher, she says, "It's 2021." However, with the 2019 start time for the rookies and a supposed year's probation, this shouldn't be possible from the show's timeline perspective.
Upvote valid corrections to help move entries into the corrections section.
Suggested correction: Nolan was not a rookie when he joined the ethics class; he was already a P2 and finishing his college degree to become a training officer.
The previously suggested correction is incorrect; he is finishing his college degree to become a training officer, but he and his fellow rookies are not at the P2 stage for roughly another month (with Nolan having an additional month after that after the events of Season 2). The original continuity mistake at the top of this thread is 100% accurate.
The Hammer - S6-E2
Nolan: Sorry I had to bail on our wedding reception.
Bailey: You didn't miss much.
The Choice - S5-E4
Trivia: Baily works for LAFD Fire Station 118, the same fire station on the 9-1-1 series; they even use the same engine for both shows.
Question: Every episode when the officers set up their "shop," they take two "war bags," a shotgun and a non-lethal shotgun. Why is the non-lethal shotgun never used?
Answer: It's been used several times. Nolan's first T.O., Bishop, used it during a home invasion call for one example.