Other mistake: When Station 51 is dispatched to the industrial fire, once they arrive there are a few shots of the crowd of bystanders, many in their robes. This footage is from the first episode "The Wedsworth-Townsend Act", during the factory fire at the start of the episode.
Other mistake: When the tones drop and the lights come on, waking up 51's guys in the middle of the night for the industrial fire, there are two closeups of the guys putting their feet into the boots and pulling up their turnout trousers. The problem is that the closeups are not Station 51's guys - note the beds, linens, walls, floor are all different. The two closeup shots are from the first episode "The Wedsworth-Townsend Act", and the guys are from Station 10.
Other mistake: When Station 51 is dispatched in the middle of the night to the industrial fire, the dispatcher says "Time out 1:07," but later at Rampart after Brackett tells Johnny to stay the rest of the night because of the exposure to the radiation, we hear the voice on the PA announce, "Visiting hours are over" even though it's supposed to be at least 3:00 AM.
Other mistake: During the burglar's rescue, when Roy uses the K-12 to cut the shaft he stops and hands the K-12 to Johnny, and in the closeup we can see he has made only one vertical cut on one side and to his left the fiberglass material hasn't even been ripped off, but after Cap's close-up, Roy's part of the shaft has been cut away on the left and right sides going all the way around the shaft, which is quite impossible since Johnny had already taken the K-12 from Roy.
Other mistake: While searching for the location of the burglar in the shafts, after John asks for a boost up, we hear one of them say, "Cap," and Cap says, "Oh. Here's a ladder, Johnny," but the subtitles read that Roy says that. (It's worth seeing Johnny drop his helmet on Chet's head.) Soon we hear Johnny say, "Man, he's really stuck..." but subtitles read, "Damn, he's really stuck..." Then later, when John helps carry the cut shaft into the hall, Cap tells him, "Here, I'll take that," but subtitles read that John says that.
Other mistake: After Station 51 responds to the 'man caught in an air conditioning duct', when they get on the elevator its metal sliding doors and metal jamb on the lower lobby have scratches and dents on the exterior, and the same scratches and dents are on the doors and jamb, when they reach the upper level.
Other mistake: When 51's guys are watching an Adam-12 episode on TV (in Emergency!'s pilot, Reed and Malloy are real), on that show just after Reed is knocked out, the hitman says "Nate would've blown his stack if I'd let you go," (refers to hitman's partner, Nate), but Emergency!'s DVD subtitles read, "Pete would've blown his stack," (Pete Malloy is Jim Reed's partner). Moments later hitman Nate yells, "I wanna talk a deal," but subtitles read, "I wanna talk to Neil," and there isn't even anyone named Neil.
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.