The Lighter-Than-Air Man - S5-E8
Visible crew/equipment: When the trailer that's on fire pulls up to the front of the station, the outline of the mic transmitter is visible on the back of the woman's blouse.
Visible crew/equipment: When Roy, John, and Vic are inside stage 3 trying to outrun Charlene, Roy starts climbing down the first ladder, and we can see equipment moving right beside Roy, then when Roy climbs back up and they find the second ladder, more movement can be seen at the bottom of the screen.
Visible crew/equipment: After they load Johnny into the ambulance, just as it's about to pull away the reflection of the location's array lighting is visible on the back of the ambulance.
Visible crew/equipment: At the site of the hang gliding accident, when Captain Stanley and Marco are pulling the stokes up the side of the cliff, the outlines of the lav mic transmitter and wire are visible on the back of Cap's shirt.
Visible crew/equipment: After Brackett examines the self-defense instructor, when Brackett speaks to Mrs. Grady in the hallway, the outline of the mic transmitter is visible at the front of Roy's shirt.
Visible crew/equipment: Near the end, when Johnny's walking from the locker room to the kitchen and checking his watch, the bulging outline of the mic transmitter is visible on the front of his shirt.
Visible crew/equipment: When Roy and John are treating the self-defense instructor, the outlines of the mic transmitter and wire are visible at the side of Roy's shirt.
Fair Fight - S6-E5
Visible crew/equipment: During the structure fire, when we see Engine 15 drive toward and then pass the camera, the large reflection of the location's array lighting is visible on the surface of the engine.
Visible crew/equipment: When the self-defense instructor is teaching the class, the outline of the mic transmitter is visible on the front of his shirt, particularly when he tells the ladies, "Here's a little bit of judo that you'll all be learning too."
Visible crew/equipment: When the dispatcher tells Copter 10 to meet Squad 51 at the five mile mark, Copter 10 lifts off, and we can see the moving shadow of the filming helicopter near the shadow of Copter 10.
Visible crew/equipment: When Station 51 is dispatched to the structure fire, just as Engine 51 rolls out of the apparatus bay, the reflections of the location shoot's array lighting and two reflector screens are visible on the side of the engine.
Visible crew/equipment: When Engine 51 and Squad 51 arrive at the training center, Captain Stanley opens the door then steps off the engine while Chet climbs down from the jumpseat, and the location's array lighting is reflected on the door's window.
Visible crew/equipment: When Station 51 is dispatched to an unknown type rescue, which turns out to be two people stuck on the side of a building, in the first shot of them the aerial camera tilts down and pans right to left, and as it does the reflection of the crane (supporting the camera) is visible on the building's glass siding, and the crane's outboard legs are also visible as the camera follows the squad into the lot.
Visible crew/equipment: After Early and Brackett do the tracheotomy, when Dix leaves treatment 4 and walks up the hallway, the outline of the mic transmitter and wire are visible on the back of her uniform top, and when she sees Johnny in the hallway, the outline of his mic transmitter is visible on the front of his shirt over his belt.
Visible crew/equipment: After Chet's disappearing half-dollar trick, when Squad 51 is dispatched to the gunshot wound, as Roy and Johnny get into the squad numerous set lights are reflected on the squad's chrome spotlight.
Camera Bug - S4-E10
Visible crew/equipment: After Johnny tries to take Chet's picture beside the map, when Captain Stanley walks from the office to the back of Squad 51, the reflection of crew/equipment are visible on the back of the squad.
Welcome to Santa Rosa County - S6-E10
Visible crew/equipment: After Sheriff Bittner breaks the door's window to get into the clinic, when they open the door just before they walk inside, the camera's tripod, the corner of the reflector screen, and a crew member wearing a blue/white cap are all visible through the doorway by the porch area.
Visible crew/equipment: When the woman drives her car up to Station 86 with the two injured passengers, the outline of mic transmitter is visible on the back of her sweater, when she gets out of the car.
Visible crew/equipment: After the rescue on the draw bridge, when Squad 51 gets back to the station Roy goes to the backyard and sits in the sports car, and in this shot just as we hear Johnny's footsteps, on the Land Rover's window we can see the reflection of a crew member who is moving backwards.
Visible crew/equipment: In the locker room, after Chet tells Johnny that he knew all about the practical joke, when they walk to the door together there's a quick glimpse of the cameraman's reflection on the door's glass, before John tells Chet about the fictitious five dollar bill down by Mike's locker.
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.