The Girl on the Balance Beam - S5-E18
Visible crew/equipment: When Roy and Johnny are with the young gymnast, the outlines of the mic transmitter and wire are visible on the left side of Roy's shirt, as he takes her vitals and places the oxygen mask on her face.
Involvement - S5-E19
Visible crew/equipment: On scene at the accident with the tanker carrying liquid hydrogen, after Chet extinguishes the fire that ignited on Johnny's back, when the fire spreads and the car explodes, the car falls onto its side and the FX stunt platform that the car was resting on becomes visible. Then two shots later that platform has vanished, as they hose down the fire.
Above and Beyond... Nearly - S5-E20
Visible crew/equipment: In the dental clinic, when the possible MI is being examined, two actors' black tape marks become visible under the patient's chair, one below the footrest and another below the headrest.
Above and Beyond... Nearly - S5-E20
Visible crew/equipment: When Johnny and Roy get back to the station, and Captain Stanley tells them to come into the office where Chief Houts is waiting, the reflection of numerous set lighting can be seen on the squad's chrome spotlight.
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: After Station 51 is dispatched to the possible heart attack, when they arrive at the scene it cuts to the interior shot of the pregnant woman walking to the door, and we can see the shadow of the cameraman moving across the lamp and curtains.
Visible crew/equipment: When the guys are looking at the vitamins that Chet brought for them 51's tones drop, and as they leave the kitchen the two actors' T-marks are visible on the floor where Mike and Marco had been standing.
Visible crew/equipment: After Captain Stanley tells the guys about the doctor who's doing the diet/nutrition study, when they leave to check the new refinery hydrants, the actor's T-mark is visible on the floor where DeSoto had been standing. Also note that DeSoto is wearing slippers when he stands up. It happens again later, he's wearing slippers with no socks when Morton is talking to the guys about stress and diet.
Visible crew/equipment: When Johnny tells dispatch to respond Engine 51 to Oceanland Park, as Engine 51 pulls away from the curb, the shadow of production equipment is visible on the engine's surface and the street.
Visible crew/equipment: When Station 51 is dispatched to the possible heart attack, just as Squad 51 is leaving the apparatus bay and passing the exterior glass doors to Captain Stanley's office, the reflection of the location's array lighting is visible on the glass doors.
Visible crew/equipment: When the dispatcher drops tones for the 'possible heart attack', just as we hear Captain Stanley respond, "KMG365," we can see movement between Engine 51's front driver and passenger seats, where the camera is located. Captain Stanley is still at the radio base station and Mike hasn't opened the door yet.
Visible crew/equipment: When Roy leans over Captain Stanley after he was electrocuted, the outline of Roy's mic transmitter is visible on the back of his shirt.
The Tycoons - S5-E23
Visible crew/equipment: After Station 51 is dispatched to the fire, a dumpster fire already put out by Phyllis, when Mike parks the engine, the reflection of crew members are visible on the jumpseat window, and the location's array lighting is visible on the engine's surface.
The Tycoons - S5-E23
Visible crew/equipment: At the chemical plant fire, when Gage is covered in the flammable pentane, Chet hoses him down. When Marco says "John, you better stay here, " Chet and Marco head off. In the next shot, when the camera pans quickly to the left of the blaze, one crew member wearing jeans and a white shirt stands behind the firemen, and another crew member wearing a grey shirt crouches at the side.
The Tycoons - S5-E23
Visible crew/equipment: At the chemical plant fire all the plant personnel are evacuated. When Gage yells that one of the valves blew, and that he's covered in the flammable pentane, the camera spins around and a crew member is visible on the right side of the screen, just as Captain Stanley and DeSoto walk up and pass him.
The Tycoons - S5-E23
Visible crew/equipment: After the alley's dumpster fire has been put out by Phyllis, when Captain Stanley tells Marco to wash it down, two tape marks and one T-mark are all visible on the ground.
The Tycoons - S5-E23
Visible crew/equipment: After inspecting Davey's Dogs, when John and Roy head to the squad discussing how only a total idiot would buy the stand, the reflection of the location's array lighting is visible on the squad's surface, and the reflection of the camera dolly can be seen on the chrome spotlight.
The Tycoons - S5-E23
Visible crew/equipment: When Roy and Johnny get back to the station talking about the ten fire inspections and two runs, the moving shadow of the boom mic is visible on the cabinets above Chet.
The Tycoons - S5-E23
Visible crew/equipment: During the fire at the chemical plant, a couple of shots after we see Captain Stanley walking between Roy and Chet as they're manning two hoses on the roof, we see a shot of Engine 15 as it heads toward the camera and then drives past it, and the reflection of array lighting is visible on the engine's surface.
The Tycoons - S5-E23
Visible crew/equipment: Just as Roy brings the victim with the heart wound into treatment 2, in the upper left corner we can see the moving shadow of the boom 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.