Emergency! the Wedsworth-Townsend Act: Part 1 - S5-E15
Character mistake: When Johnny and Roy are in the kitchen and start reminiscing about when they first met, Johnny recalls those days and says "I was working B shift at Station 8's," however, Johnny was actually working at Station 10.
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.