How Green Was My Thumb? - S3-E17
Visible crew/equipment: Just as Roy opens the door to Mrs. Johnson's apartment and he and Johnny walk in, the shadow of production equipment (looks like a reflector screen on a tripod) is visible on the wall behind them.
Other mistake: At The Boat explosion incident, when Roy and Johnny climb aboard The Boat Johnny says, "We'll set up the Biophone here," but subtitles read "We'll set up the platform here." Subtitles from Universal Studios 2010 DVD.
Other mistake: When they're trying to identify the address of the attempted suicide, Engine 51 stops and is standing by at 223 Street and Ridgely, while the squad drives elsewhere, and when Squad 51 stops it's standing by at 218 Street and Carson. However, when they're dispatched we see that the rigs are actually pulling away from the same corner but facing opposite directions, note the area and background. Then when Johnny and Roy put on their turnouts, in the next shot of Engine 51 it's now driving towards the camera in the opposite direction on the same street they had pulled away from.
Other mistake: When the squad and engine roll up on the scene of the bulldozer accident in the junkyard, just as the guy runs up to inform them about the victims, have a look at Squad 51's license plate number because it is not the normal prop plate number E999007.
Visible crew/equipment: When the boy who ingested ant poison is being wheeled into treatment 3, in the shot from the hallway we can see the electrical cord and plug lying across the floor, but in the next shot from inside treatment 3, that cord has vanished.
Other mistake: Just as Squad 51 reaches the Tank Motorway, in the shot of the squad as it drives towards the camera before it zooms out, look at the squad's license plate before it stops. Even through the haze, we can see that the plate number is not Squad 51's normal E999007.
Visible crew/equipment: At the horse ranch, after Bill falls off the horse again while the squad is chasing after him, when Roy kneels beside Bill we can see the shadow being cast by production equipment, presumably the reflector screen, on the ground behind Roy. Then after John checks Bill's ears and pulse, just as he contacts Rampart for the second time, we see movement which looks like a sleeve on the right side of the screen, beside John.
The Promise - S3-E11
Continuity mistake: When Roy and John walk into Edna Self's house, in her closeups she's wearing a light beige floral robe, but in the shots facing the guys we can see that it's a dark solid color robe that's on the chair. Notice how odd it is that the three are not in any shots together - Edna's not in any shots facing John and Roy, and they're not in any shots facing her.
Other mistake: When Roy and John are examining the boy who jumped from the ledge, they're standing at the back of Engine 85 while the boy's sitting on the tailboard, and we can see behind his head the vinyl material with the imprinted 85, covering the attached plate with the real company number.
Continuity mistake: When Engine 51 gets the run in the middle of the night, the engine company rushes to the rig including Johnny, which leaves Roy standing in the dorm alone. After he shouts out to Johnny from the doorway, when Roy turns to go back into the dorm, some changes have occurred - the locker room door is now closed, there are clothes lying on Cap's bed where none were a moment ago, etc.
Visible crew/equipment: After Roy tells Jason that he has time to pop up to the orthopedic ward because it's Johnny's turn to cook, when Roy heads out receiving we can see the top of the set over treatment 1, right behind Johnny.
Visible crew/equipment: When Squad 51 arrives at Homer's house, we can see the outlines of the mic transmitter and wire on the back of the old cowboy's shirt.
How Green Was My Thumb? - S3-E17
Continuity mistake: When Roy and Johnny search for the missing man during the fire at the winery, Johnny jumps into the wine vat to rescue the drowning man, getting himself completely soaked, but when he and Roy bring the man out to the squad, Johnny's clothes are pretty much dry.
How Green Was My Thumb? - S3-E17
Visible crew/equipment: When Johnny follows the nurse as she gets off the elevator on the fourth floor, the outlines of the mic transmitter and wire are visible on the back of the nurse's white uniform.
Continuity mistake: When John and Roy are at the park with the injured football player and his son, the shadows that are cast over the entire area change significantly when the ambulance arrives.
Visible crew/equipment: While Squad 51 is parked at ER receiving, John and Roy tell Dr. Early about the squad's engine problem, and when Early fixes the engine problem, we can see the reflection of numerous set lighting on the squad's chrome spotlight.
Other mistake: During the fire at Hammond Chemical, when Engine 7 rolls up and lays duals, we can see the vinyl material adhered to the top of the cab covering the engine company's real number.
Other mistake: During the paint factory fire, when Engine 2 rolls up, we can see the red, large, rectangular vinyl material that is adhered to the front of the engine, with the company number printed on it. There's also vinyl material adhered to the top of the cab as well as the back of the engine with nothing on it, presumably covering the engine company's real number.
Other mistake: When Squad 51 is dispatched to the possible heart attack, while Chet’s at the base station responding to the dispatcher, the lightbar atop Squad 51 has nothing covering the chrome, but en route in the close up there's black tape covering much of the chrome trim.
The Promise - S3-E11
Other mistake: At the very end, when Roy is cleaning the windshield while John's fiddling with the squad’s radio mic, the spray can on the hood of the squad has tape covering the brand name.
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.