Towards the end, when Desoto and Kelly are coming to visit Gage, Dixie tells them "Room 205"; but when Dixie brings the other nurse into the room to see Johnny, the room number shown on the door is 230.
As the engine leaves to take John Gage to the hospital, the ropes previously used by the crew were never picked up near the rear of the engine but they are gone when Mike Stoker pulls the wheel chock.
Helicopter 14 drops a load of water on a car fire smoldering deep in the shrubbery. But when the firefighters and paramedics reach the scene only a minute or so later, the ground, car, victims, shrubbery etc. are all completely dry.
About 41 minutes into the episode, John starts his IV and the crew scrambles to leave with John in the hose bed of the engine. Between the close shot and long shot, Chet's helmet appears on his head.
When we see Engine 85, it's a Crown, but in the previous episode, it was a Ward-LaFrance.
As Engine 51 is driving to Rampart with the injured Johnny Gage on the back, Captain Hank Stanley can be seen holding the microphone backwards as he is relaying information to Rampart. There was no noise cancellation technology at the time of Emergency! Turning the microphone around was a strategy to ensure the clarity of his speech through the background noise, i.e. the engine's siren, motor, road sounds, etc.
Two completely different actors are shown operating the bulldozer as it makes a path down the hill toward the wrecked car. One operator is an older guy wearing a helmet with no face shield. The other operator is a young guy with a helmet and full face shield.
During distance shots of the dozer, the operator has a full-face shield attached to his helmet. Close-ups of the actor have him wearing the helmet without the shield.