Other mistake: After Battalion Chief tells Squad 51 to go to the elevator shaft, when Roy, Johnny and Jason enter the building, the DVD subtitles read that Captain Stanley says "Here, the elevator, it's jammed," when in fact it's the Battalion Chief who says that - Captain Stanley is not even with them. Additionally, Johnny asks, "Is somebody in here, Cap?" even though he's addressing the Battalion Chief, not Captain Stanley. Then it's Roy who asks for the oxygen, but subtitles read that Johnny asks for it.
Other mistake: When Squad 51 and the engine company arrive at the rock quarry, in the shot after John tells Jason to get the HT, just as Roy, Captain Stanley and Mike walk towards the right side of the screen, something drops down from the top of the screen, enough to cover the top left corner of the screen area, then gets pulled back up.
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.