Visible crew/equipment: When Gage and DeSoto are on the football field with Steve, the quarterback, the outlines of both the mic transmitter and its cable are visible on Gage's shirt as he helps Steve sit down on the gurney. Then when DeSoto takes Steve's blood pressure, the outlines of both the mic transmitter and cable are also visible on the back of DeSoto's shirt.
Visible crew/equipment: While the guys are sleeping at 12:47 am, the camera moves across the dorm, and just as the camera moves past the brick wall divider beside Roy's bed, it casts a moving shadow at the top.
Visible crew/equipment: During the rescue of the unconscious boy stuck within the tree, when DeSoto climbs the ladder to begin chiseling at the tree, the outline of the mic transmitter is visible on the back of DeSoto's shirt.
Visible crew/equipment: When DeSoto and Gage are trying to rescue the unconscious boy stuck in the tree, Gage drills a hole in the tree, and when he reaches down to the oxygen tank and then places the tube in the hole, the outlines of both the mic transmitter and wire are visible on Gage's shirt.
Visible crew/equipment: After Roy and Johnny have listened to Brackett's tape of 110's rescue, when they get to the squad the outline of the lavalier mic transmitter is visible on the back, right side of Johnny's shirt, as he stores some things in the squad.
Visible crew/equipment: After Roy and Johnny give a CPR demonstration at the ladies' club, when one of the women thanks the paramedics, the outline of the lav mic transmitter is visible on the back of Roy's shirt.
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.