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.
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.
Visible crew/equipment: After Mrs. Mannering walks over to Dixie and asks about her son, when she and Dixie head to Brackett's office, the outline of the lav mic transmitter is visible on the back of Dixie's uniform, and a bulge is also noticeable on the back of Mrs. Mannering's sweater.
Continuity mistake: When Tommy's in the treatment room, drinking chocolate milk and playing with the Lincoln Logs, the building he's putting together changes significantly between the two side shots and the shot facing him.
Continuity mistake: When Roy and Johnny are climbing the aerial ladder to get to the boy on the ledge, in the overhead long shot we see down below that the Biophone and drug box are placed on the ground, right beside 85's captain. Then later, after the boy tries to jump, the captain instructs one of his men to go get the paramedics' Biophone and drug box, even though we saw them already placed there awhile ago.
Continuity mistake: After rescuing the young boy from the structure fire, when Roy and Johnny are stopped by a reporter with a camera crew and asked questions, the boy is standing behind Roy, then between shots the boy is standing in front of Roy.
Audio problem: When Truck 85 raises the aerial ladder so Roy can get to the boy on the ledge, the aerial apparatus operator tells Roy, "DeSoto, up the ladder," and we hear Roy respond, "Okay, Cap." There are two problems here: first, Roy's mouth movements are not in sync with what we hear, and second, Roy is not responding to 85's captain, he's responding to the aerial apparatus operator. The captain is standing on the ground behind Truck 85.
Continuity mistake: At the structure fire with the trapped young boy, when Johnny and Roy enter the building Johnny's SCBA tank is all yellow - no stickers, and Roy's tank has a white sticker and a red sticker, but in the following shots looking for the boy until they exit the building, their tanks keep on changing.
The Promise - S3-E11
Visible crew/equipment: Once the ledge rescue is over, after Johnny tells Brackett that he could put in a good word for him to join the paramedic program, when Roy opens the squad door to get in, the wing mirror offers up nice reflections of a few crew members.
The Promise - S3-E11
Plot hole: When Bo Jenson visits Richard Allen, he takes the elevator at the far south end of the ER wing, near the ER nurses' station, straight up to the 6th floor and then turns left to get to Richard's room in the short hallway, by the windows. When Richard jumps out the window and lands on the ledge, we see he's on the south side of Rampart's main building. Considering the actual floor plan of the hospital, this is completely impossible. The ER is located in the south lower wing and only has two floors, so Jensen could not have gone up to the 6th floor from the elevator he took.
The Promise - S3-E11
Other mistake: Richard is in room 603 and jumps out of the 6th floor hallway window. In the long shot of the exterior of the building, we see that he's lying on the ledge of the row of windows that are second from the top. The elevator shows 8 floors, which means that he's actually lying on the 7th floor's window ledge.
The Promise - S3-E11
Continuity mistake: When Roy and Dr. Brackett are on 127's Snorkel while Johnny is trying to subdue Richard on the ledge, Brackett is not wearing any rings, but after loading Richard into the Stokes, when Brackett is grabbing hold of the basket in the closeup he's wearing two rings on his left hand, which vanish in following shots.
The Promise - S3-E11
Visible crew/equipment: After Squad 51 is dispatched to 'woman down', just as the squad rolls up in front of the apartment building we can see a bit of the camera's production equipment at the bottom left corner of the screen, which is then pulled quickly out of shot.
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.
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.
The Promise - S3-E11
Revealing mistake: When Richard jumps out of the 6th floor window, in the interior shot we see that he lands right at the base of the window's frame, as his body bounces back from the impact, but when Brackett looks out the window Richard is lying on the ledge, which is much farther down than the window's bottom frame.
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Other mistake: When Johnny and Roy get back to the station, Chet tells Johnny that Paula's going to come by around 12:30 PM, then when the dispatcher sends Squad 51 on the 'woman down' run he says "Time out 12:22." When the guys get back to the station again, Paula tells Johnny that she arrived around noon and that Engine 51 left on a run shortly after.
The Promise - S3-E11
Continuity mistake: When Johnny and Roy get back to the station and talk to Paula in the rec room, in the wide shot Johnny has his hands on his hips and then subtly moves his elbow behind Roy, but it cuts to a close-up and his elbow is still blocking Roy.
The Promise - S3-E11
Continuity mistake: When Richard jumps out of Rampart's 6th floor window, the bottom of his feet are very filthy (impressive for someone in bed in a catatonic state), but when he wakes up while lying on the ledge and Johnny tries to control him, Richard's feet are now pretty clean.
The Promise - S3-E11
Continuity mistake: When Johnny's on the ledge trying to subdue Richard and goes over the side, Johnny's uniform shoes change. The stunt double's shoes have flat soles with ridges.
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.