Revelations - S3-E6
Continuity mistake: When Tim puts Lucy in the squad car after "arresting" her, the rear door on the driver side is open, but when the camera pans back to her it's suddenly closed without making a sound.

Revelations - S3-E6
Continuity mistake: When Tim puts Lucy in the squad car after "arresting" her, the rear door on the driver side is open, but when the camera pans back to her it's suddenly closed without making a sound.
Continuity mistake: In the episodes before "La Fiera," Nolan's new truck is a black Toyota Tundra. However, after that episode, it changes to a Nissan Titan, yet his character still says, "black Toyota Tundra."
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.
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.
Trivia: Alan Tudyk asks the resident cop if there were any aliens at the hotel. In Resident Alien, Alan Tudyk played a real alien. (00:04:10)
The Choice - S5-E4
Trivia: We see Bailey and her team of firefighters arrive at the house on Engine 118, which is the same engine that Captain Nash is in charge of on 9-1-1, also set in Los Angeles.
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.
The Hammer - S6-E2
Nolan: Sorry I had to bail on our wedding reception.
Bailey: You didn't miss much.
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.