Other mistake: When Johnny and Roy are at the house with the three wild, obnoxious boys who terrorized their sitter, Johnny takes her blood pressure with the cuff, while Roy takes her respiration and pulse as he looks at his wrist for the second-hand countdown, but the problem is that Roy isn't even wearing his watch, and the actor has a bizarre look on his face when he looks at his naked wrist. He then tells Johnny that her pulse is 140 and respiration is 35. When the ambulance attendants arrive, Roy is wearing his watch. If he had his watch he should have used it for the pulse and respiration.
Other mistake: When Roy and Johnny are waiting in the staff lounge for Dr. Morton, Johnny opens the newspaper's sport's section and sees Brice's picture. In the page's close-up, two paragraphs in two unrelated articles are the same, and they also have nothing to do with the title of the articles. The first paragraph begins, "Thus at this conference all our governments..." and the second begins, "Of no less importance was the common recognition..."
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.