Continuity mistake: When Bo goes to Richard's room for the first time, in the view from inside the patient's room, as Bo pushes open the door we can see the hallway behind him, and there's a perpendicular wall beside the door. This wall does not exist when he visits Richard the second time, because there's a hallway leading to the elevator outside of Richard's door.
Continuity mistake: When Bo Jensen goes to Richard's room for the second time, as he pushes open the door we can see there's a wall perpendicular to the door, but when Bo is in the room there's a wide widow covered with curtains where that wall was. The window with curtains can also be seen in the exterior shots, when Richard jumps out the hallway window.
Visible crew/equipment: After Mrs. Mannering walks over to Dixie and asks about her son, when she and Dixie head to Brackett's office, the outline of the lav mic transmitter is visible on the back of Dixie's uniform, and a bulge is also noticeable on the back of Mrs. Mannering's sweater.
Continuity mistake: When Dixie opens the door to Brackett's office, there's a pile of white papers on the desk in front of Brackett, but when he walks out of the office, in the view from the hallway, the desk lamp has moved and there are no papers where there were in the previous shot.
Visible crew/equipment: After Roy breaks the window with the chair, the guys place the ladder against the window and Marco starts to climb up. In the next interior shot, just as Roy and Johnny lift the security guard, right outside the window we can see the corner of something else (platform-like), besides the top of the ladder.
Continuity mistake: When Station 51 is dispatched to the car over the cliff at Bear Mountain, the timeout is 08:12, then when Roy contacts Rampart his watch reads 6:55. When Johnny checks the girl who can't see, his watch reads 12:45, but when Johnny contacts Rampart his watch reads 6:05. Then after the snakebite, when the guys carry Johnny to the back of Engine 51, Johnny's watch reads 10:35.
Revealing mistake: After the snakebite, when the guys carry Johnny and place him at the back of Engine 51, the chrome spotlights are shiny and reflective, but in the closeups the spotlight near Marco has been partially sprayed with a dulling spray, to prevent the camera's reflection.
Continuity mistake: At the scene of the traffic accident, when Johnny tries to calm the woman who cries that she's afraid, it cuts to a shot of Chet as the camera pans to the left, and we see the position of the pickup truck on the road. When they hear the siren of help coming, Chet stands in the road directing the vehicle, and the pickup is not where it was in that earlier shot, it's now much farther down the road.
Continuity mistake: At the start, there's a closeup of Roy, Johnny, and Chet, and it cuts to a long shot of the landscape around them while they're driving, then it cuts back to the closeup. The landscape the Land Rover passed in the long shot is entirely different than in the previous and following closeups.
Visible crew/equipment: At the structure fire, when Squad 51 stops at the hydrant to lay the dual lines, as Engine 51 drives past the squad, the reflections of array lighting and the reflector screen are briefly visible. Then when Engine 51 rolls up to the fire, as Captain Stanley tells dispatch to send a second alarm and approach from the west, we can see the reflection of a crew member wearing a long sleeved white shirt and dark slacks, in the window behind Captain Stanley. He's still visible when Squad 51 pulls up alongside Engine 51, and also when Cap tells Engine 9 to lay duals.