Continuity mistake: When Squad 51 is dispatched and headed to their destination, interior shots looking out the windshield are shown. It is only in these shots that the Dodge truck's red hood has vents on its right and left sides. There is no such thing in any exterior shots of Squad 51. The hood's style also changes.
Continuity mistake: In nearly every episode, the dark blue jackets that Gage and DeSoto wear suddenly appear and/or vanish and then reappear, numerous times, while en route in their squad, or when they pull into the stationhouse and Rampart. Since stock footage is usually used when showing all the guys getting into their vehicles, Johnny's hair length may differ as well.
Continuity mistake: Frequently during the first two seasons there will be long shots of Squad 51 running down the road but it has mysteriously become a mid-60's Dodge (easily visible because of the red painted grille) instead of the familiar 1972+ model Dodge with a chrome grille. It also has 51 on the door which makes for a significant paradox.
Continuity mistake: After Johnny learns of his last rescue's death, when he enters the hallway the treatment room beside the nurses' station is treatment 4, but when Brackett and Early pass the nurses' station to go save a rabbit from a sousaphone, it's treatment 2 that's beside the nurses' station. Then, as soon as Brackett and Early enter their door, in the next shot as Dix speaks to the officer, it's treatment 5 beside the nurses' station.
Continuity mistake: While Roy and John are at the boatyard searching for the girl's severed hand, when they walk into the mess of lumber neither of them can be seen in the other one's closeup, even though they both start looking around in the same spot, at precisely the same time.
Continuity mistake: When Dixie and Johnny reach the overturned car at the cliff, the bumper on the car goes from shiny to mud encrusted, and the amount of branches, etc that covered the car decreases significantly, by the time the car falls over the cliff.
Continuity mistake: After the car falls over the cliff, Roy and Johnny notice Dixie lying on the ground and in her closeup her sweater sleeve is rolled up above her elbow, but in the following shots that sleeve is rolled down properly until Roy pulls it up to take her BP.
Continuity mistake: When Brackett and Early walk into the treatment room with the boy whose rabbit is stuck inside a sousaphone, they head into the treatment room opposite the receiving entrance, on the same side as the nurses' station. However, after the rabbit's rescued, when Dixie opens the door so the boy can leave the room we can see it faces the wall and treatment room beside the nurses' station. I would provide treatment room numbers, but the room numbers keep changing in this episode.
Continuity mistake: At the very start, as the camera moves through Station 10, the Battalion Chief's vehicle is parked beside the fire pole, but when the tones drop and everyone rushes to the rigs, the Chief's car is now parked much further up, closer to the apparatus bay door.
Continuity mistake: When the Battalion Chief's car arrives on scene at the factory fire, he and the driver get out of the car, then it cuts to shots as they both stand beside the wall while the Chief talks to dispatch over the HT, but a few shots later we see the driver just getting out of the car as Engine 36 passes.
Continuity mistake: When Roy and Johnny are with the tunnel worker who's in V-tach, the lights go out in the tunnel and Roy places one of the lanterns on the Biophone, but in closeups of the Biophone the lantern has vanished, then the lantern is back again once they've defibbed successfully.
Continuity mistake: When Peter staggers into the ER because of insulin shock, Dixie walks down the hallway passing treatment rooms 2 and 4, with treatment 2 being beside the nurses' station, and it's the same set-up later when Peter's girlfriend speaks to Dixie in the hallway. However, in prior and subsequent shots of the hallway, it's treatment 4 that's beside the nurses' station.