Visible crew/equipment: After Gage and DeSoto climb the ladder to get the dog off the roof the second time, when it cuts to Rampart there is a man waiting outside the treatment room, and the actor's tape mark is visible on the floor, at his feet.
Visible crew/equipment: When Squad 51 responds to 'man injured', when they arrive at the house, Johnny asks Roy if there's a dog on the roof, and it cuts to a shot of Sheba, the dog, just as she glances toward the tree, and behind the tree we can see the moving legs of a crew member, likely Sheba's trainer.
Visible crew/equipment: When Johnny climbs the ladder and then picks up Sheba to carry her off the roof, the outline of the mic transmitter is visible on the back of his shirt. Additionally, as he's lifting Sheba the big dog pushes up against the front of Johnny's shirt, and we hear the crackling noises that were picked up on Johnny's hidden mic.
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.