Visible crew/equipment: While Squad 51 is parked at ER receiving, John and Roy tell Dr. Early about the squad's engine problem, and when Early fixes the engine problem, we can see the reflection of numerous set lighting on the squad's chrome spotlight.
Visible crew/equipment: When Roy and Johnny are in the basket with the man who was electrocuted, after they finally get the victim on the ground and surround him, the shadows of the cameraman/camera are visible mainly on Roy and Captain Stanley.
Visible crew/equipment: When John and Roy get back to the station, Captain Stanley asks them to step into the office, and as Cap walks through the doorway the camera's shadow is visible on the wall at the left. Also note the coiled electrical wire lying on the floor in front of the squad, and the shadow of something that is directly in front of the squad, even though the squad just rolled in.
Visible crew/equipment: When the woman staggers into the ER a nurse rushes over, and the actor's T-mark is visible on the floor in front of the admitting desk, where the nurse was just standing.
Visible crew/equipment: When Roy and Johnny climb the tower to rescue the man at the top, Johnny slips and Roy helps him down the ladder. When Chet begins his ascent, twice there are shots looking down the center of the tower, and in those two shots the cases of production equipment are visible on the landing where the camera is situated. The print on one case reads "400' MAGS", referring to the filmmaking magazines.
Visible crew/equipment: Just before the hermit leaves Rampart, the actor's mark is visible on the floor in front of the market owner's feet, and when Dixie turns the hermit's wheelchair, the tape mark in front of Brackett becomes visible.
Propinquity - S3-E20
Visible crew/equipment: At the abandoned refinery, just after Roy attempts to pull out the man pinned under a tank, but is unsuccessful the first time, when it cuts to Captain Stanley and Chet, who are on the third level hosing the fire through the doorway, at the left of the screen a crew member is visible, watching them.
Propinquity - S3-E20
Visible crew/equipment: When Roy moves the squad forward to tow the wrecked car away from the flames, as he opens the driver side door to get out, we can see the reflection of the silver reflector screen in the squad's long wing mirror.
Propinquity - S3-E20
Visible crew/equipment: When Engine 51 first arrives at the abandoned refinery and stops to hook up to the hydrant, the multiple location set lights are reflected on the engine's large windshield.
Propinquity - S3-E20
Visible crew/equipment: When the ambulance that Roy is riding in is involved in a traffic accident, the ambulance driver, Hal, comes out to help, and the outline of the mic transmitter is visible on the back of Hal's white shirt.
Inventions - S3-E22
Visible crew/equipment: At the site of the major chemical leak, after Johnny falls from the pipes and Roy lifts him up, a couple of shots later there is a medium shot of one of 105's guys on Deluge 105 pumping out water, and we can see a cameraman (filming Deluge 105's closeups that we see during this scene) holding a handheld on the right of the screen, behind the pillar.
Inventions - S3-E22
Visible crew/equipment: After Roy and Johnny rescue the worker in the midst of the chemical leak, when Captain Stanley asks the Chief over the HT to send the ambulance, two crew members are seen behind him. When the victim is pulled across the lifeline, as he reaches the engine a crew member, with black hair wearing a white shirt, is seen standing behind the engine. Then, when Johnny hauls himself across the lifeline, just as he reaches the engine we see a crew member, with black hair wearing a white shirt (likely same one as earlier), who arches up then ducks back down behind the engine.
Inventions - S3-E22
Visible crew/equipment: On site at the major chemical leak, when Johnny burns his hand and falls backward, on the ground behind him there's a crew member that can be seen crouching behind stacked cement bags, looking in Johnny's direction.
Inventions - S3-E22
Visible crew/equipment: When Roy and Dixie are talking at the nurses' station about the "radioactive" truck driver, Johnny walks up to them, and when he removes the rope and stanchion, the actor's tape mark is visible at Johnny's feet.
Inventions - S3-E22
Visible crew/equipment: On site at the chemical leak, when Captain Stanley talks into his handie-talkie and says "Engine 36, we're not doing any good with this, let's try light water," in the next shot, while the camera pans to the right, we can see a cameraman (filming Deluge 105's closeups that we see during this scene) holding his handheld, standing in front of an engine and facing Deluge 105, just before the camera focuses on the guys with the hoses.
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.