Other mistake: While Charlie is trying to figure out what's wrong with the squad, when Captain Stanley, Roy and John are sitting around the table, there's a can of scouring cleanser which has yellow tape covering the "a" and "x" so all we see is the "ja" on the can, in order to hide its brand name, which is Ajax.
Visible crew/equipment: When Charlie's at the station, complaining that every time one of the squads breaks down it's only crying out for mercy against the drivers, and that firemen are the worst thing to happen to the squads, we can see the reflection of the boom mic on the windshield of Squad 51.
Continuity mistake: While Charlie is finishing up on the squad's engine, Captain Stanley hands Johnny the address in the canyon that has overgrown weeds, and when Johnny packs up the toolbox, Charlie holds out the roll of electrical tape and the combination wrench, with its open-end up. However, in the next shot the only thing Charlie holds out is the wrench, but with its box-end up.
Visible crew/equipment: After rescuing the injured worker from the top of the sky-tower at Oceanland Park, when Mike has a problem starting 51's engine, we see reflections of array lighting on the squad's surface. And when Captain Stanley moans that he'll have to call Charlie, he stands in front of the engine and calls out, "Why me?" and one of the location's array lighting units is visible at the left side.
Audio problem: When the guys reach the top of the tower ride at Oceanland Park, we hear Captain Stanley say, "Kelly, you go up on top and throw the tag line over the side, we'll take the stokes up that way," but Cap's mouth is saying something entirely different.
Visible crew/equipment: After Johnny and Roy are called back into the home of the young couple, who were issued the fire-code violation ticket, when Roy is on the Biophone with Rampart, the bulging outline of the mic transmitter is visible at the left side of Roy's shirt, just over his belt.
Visible crew/equipment: When the guys are on the tower ride during the rescue, the shadow of the chopper (and its rotating rotor blades) doing the aerial filming becomes visible, when the ride reaches the bottom. Then the shadow of the entire chopper moves in directly in front of the ambulance, as they load the ambulance.
Continuity mistake: When Roy and Johnny get to the address in the canyon that has overgrown weeds and shrubs, in violation of county ordinance, Johnny is empty-handed when they knock on the front door, but when they're told to come in Johnny is now holding the large fire-code violation ticket booklet.
Continuity mistake: After Station 51 is dispatched to Oceanland Park, when the engine and squad drive through the parking lot and pull up in front of the sky-tower, the entire left side of the lot is completely empty, but in the overhead shot as they head to the top of the sky-tower for the rescue, that side of the lot is filled with buses, cars, and other vehicles.
Continuity mistake: When Station 51 is dispatched to Oceanland Park, when the engine and squad arrive on scene at the sky-tower, Engine 51's hosebed is suddenly entirely covered with green canvas.
Visible crew/equipment: When Squad 51 stalls and the guys call for assistance, when Charlie shows up and walks over to the squad, the reflection of the camera rig tracking backward can be seen in the squad's vent window. The reflection of location set lighting is also visible on the spotlight and squad.
Continuity mistake: When Charlie notices the scrapes on Squad 51's tire and complains that its drivers are messing with the squad's alignment, note that the scrapes' positions change twice, which means that the tire has rotated, even though the squad has not moved since the start of the scene when Chet walked over.
Continuity mistake: After Charlie checks the squad's engine, and replaces the adhesive bandage on the wire with proper tape, Charlie places the tape roll back into the tool box, but when John collects the rest of the tools lying around, Charlie gives him the role of tape, which is out again.
Visible crew/equipment: After Station 51 is dispatched to the structure fire, en route Squad 51's engine stalls and starts again, then while they continue driving when the dispatcher cancels the run the reflection of the filming vehicle can be seen on the squad's surface.
Visible crew/equipment: When Charlie stops at the station to service Engine 51, while Roy and John are trying to service the squad, the multiple reflections of location array lighting are visible on Charlie's squad, and on Squad 51's spotlight.
Answer: It is standard practice to wet down driveways so that they stand out in a long shot.
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