Other mistake: During the fire at the paint factory, just after the barrels at the back of the pickup up truck explode, in the next shot we see Marco and Chet manning a hose. In this closeup, another fireman runs up to them and he's wearing a helmet with 51 on it, but it's obvious he's not one of 51's guys, plus Roy and John are with the burn victim and Mike's at the engine. The fact that it's a closeup and we can see perfectly well that he's not actually from 51 makes this too odd.
Other mistake: After Mr. Winthrop is brought to the ER, there is a closeup of his EKG monitor as it's picking up multiple PVCs, but when Brackett asks him about the tension in his life, the monitor seen behind him is showing a flat line. This happens once again after Roy and John leave the treatment room, just before they move him to CCU.
Other mistake: After Roy and Johnny get back to the station, when Johnny takes the container of milk out of the fridge, we can see the black tape around it covering the brand name. There's another container in the fridge with red tape covering its brand name as well.
Other mistake: When Roy's talking to Dixie while John's waiting out in the squad, a call comes over the HT that Roy's holding, and Squad 51 is asked to respond to a 'possible heart case'. Roy pulls a piece of paper out of his pocket, and as we hear the dispatcher giving the address, we can see Keven Tighe softly mouthing the address at the same time that it's being given for the first time.
Other mistake: At the structure fire, Roy and Johnny rescue 17's Captain Harmell, as seen on his helmet after he fell through the roof, but when Truck 17 sends its snorkel to the roof, 51's Captain Stanley and Captain Watson, whose helmet also shows 17, both assist with the rescue of the other Captain of 17.
Other mistake: While the guys are in the kitchen, deciding whether or not to keep the dog and then what to name him, when Chet is drinking the milk, we can see the red tape covering one side of the container to hide the brand name and logo.
Other mistake: When Squad 51 is dispatched to the movie studio, while en route in the interior shot, in the rear-view mirror we see the reflection of the driver's helmet, and it has an 18 on it, instead of 51.
Other mistake: When the boy is brought to the ER by his babysitter, they hook him up to the ventilator and we see the bag dramatically showing inflation and deflation in the closeup, but in the wide shots the bag is deflated and doesn't move.
Pressure 165 - S5-E7
Other mistake: When Johnny brings in the bags full of groceries for the dinner he's cooking, and also later when he discovers that the liquid in the pot turned green, there is tape covering the brand names on the packages.
Other mistake: At 6:50 AM, just before the dispatcher transmits the testing tones to Station 51 which wakes everyone up, we're shown the exterior shot of the station and the two flags are already flying. Guys of C shift (as Chet states) haven't arrived yet that morning, so they didn't raise the flags, and we know it's Mike who always raises the flags on A shift, but he only just woke up when the dispatcher sent the tones.
Other mistake: When Station 51 is dispatched to the structure fire, the address is given as 1127 West Winston, but when they're on the scene, the fire flashes through the front door causing Marco and Chet to fall back, and the house number on the stairs is 1026.
Daisy's Pick Blind Date - S4-E7
Other mistake: When Johnny and Roy are in the ice house, there's a closeup of Johnny's arms as he's hosing down the ice and removing it from the hypothermic victim's arm, but it's obvious that the dark hairy arms belong to the stunt double, not to Johnny.
Other mistake: When Johnny and Roy are at the construction site with the injured father and son, Rampart is also on the line with two other squads - Squad 18, treating a pulmonary edema, and Squad 36, treating a bike accident. When Marco and Chet carry up the stokes basket, we hear the dispatcher saying, "Engine 21 and Squad 18, heart case...," even though Squad 18 is already tied up with the pulmonary edema.
Other mistake: On Emergency! there's a noticeable lack of blood (not that it's a bad thing), even on the medical disposable gloves, during numerous scenes such as when a victim has arterial bleeding from carotid, brachial, and femoral arteries, or during the surgical procedures, and the labor/delivery scenes.
Camera Bug - S4-E10
Other mistake: At the end of the episode, when Johnny's telling the other guys that his photograph was bought, the box of cereal and carton of milk that are on the table have tape affixed to them, to deliberately cover their brand names.
Other mistake: When Squad 51 is dispatched to the liquor store shooting, en route they are almost hit by a driver who passed a stop sign at the intersection. This is the same footage from season 2, episode 13 "Drivers", when the squad is almost hit by a car while responding to a football injury.
Other mistake: When Roy and Johnny are working on the squad's engine, while Johnny's lying on the mechanic's creeper, Roy is holding a spray can with white tape wrapped around the top of the can, so the brand name would not be visible.
Other mistake: After Dr. Early fixes the squad's engine problem, while Roy and Johnny are driving away, Roy's watch reads 10:30, but when the dispatcher sends them to the leg injury he says that the time out is 11:52. Then at the scene of the football player's leg injury, Roy's watch reads 8:15 and Johnny's watch reads 9:30.
Other mistake: When Tommy is in the treatment room drinking chocolate milk, the container of milk has tape wrapped around it, so the brand name would not be visible. Later at the station, when Chet is polishing the table in the kitchen, the spray can he's using has tape wrapped around it as well, for the same reason.
Other mistake: During the structure fire at the Atlas Hotel, when Roy and John are with the unconscious man being given proper CPR by civilians, it is too painfully apparent that the man giving rescue breaths is just leaning over the man's face, nowhere near the victim's mouth, particularly after Marco and Chet drop off the stokes.
Answer: I believe you are speaking of the old man, Mr. Wilson. He's played by J. Pat O'Malley.
Bishop73
Correct, it was J. Pat O'Malley...he also played the grandfather with his grandson when their rocket exploded, and also played "Old Bill" in the episode with Ann Prentiss, where Gage saves the little girl from the burning tree house, and her mother falls in love with him.