Smoke Eater - S4-E16
Visible crew/equipment: When Station 51 is dispatched to the 'structure fire', in the shot facing the squad as it starts to roll out, we can see the black tape covering the lightbar's chrome surface atop the squad, which also vanishes at the incident.
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.