Visible crew/equipment: After Dr. Early tells Mr. Jefferson that he knows who he is, it cuts to Johnny at the table with the typewriter, and the shiny chrome surface of the coffee pot reflects multiple set lights.
Visible crew/equipment: After we see Marco and Captain Stanley heading up to the roof, it cuts to a shot in the elevator when Roy says "The firemen are working as hard and as fast as they can, to get us down from here," and the crew's moving shadow can be seen on the left, where the camera is located at the elevator doorway.
I'll Fix It - S4-E2
Visible crew/equipment: When Roy and John walk into the grocery deli, a few of the location shoot's array lighting are reflected on the glass door.
Visible crew/equipment: When Station 51 is dispatched to the industrial accident, with the big guy suffering from a chemically induced psychosis, the outline of the mic transmitter and wire are visible on the right side of the big guy's T-shirt.
Visible crew/equipment: When Station 51 is dispatched to the structure fire at the Kiddytime Toy Factory, while en route there's a shot from the POV of the top of Squad 51, and the reflection of the cameraman and the camera can be seen on the lightbar's chrome surface.
Visible crew/equipment: After Station 51 responds to the unknown type rescue, Engine 51 leaves on another run, but when Johnny and Roy go into the house with the wife of the man who lost his voice temporarily due to the dieffenbachia plant, the bulging outline of the lavalier mic transmitter and wire are visible on the back of her white robe.
Visible crew/equipment: At the horse ranch, after the man falls off the horse John and Roy rush over, and as Johnny leans over him the bulging outline of the lav mic transmitter is visible on the back of Johnny's jacket.
Visible crew/equipment: After Mrs. Mannering walks over to Dixie and asks about her son, when she and Dixie head to Brackett's office, the outline of the lav mic transmitter is visible on the back of Dixie's uniform, and a bulge is also noticeable on the back of Mrs. Mannering's sweater.
Visible crew/equipment: When 51's guys are sitting around the table discussing the inheritance, numerous overhead set lights are reflected on the chrome coffee pot's surface.
Visible crew/equipment: After Johnny tells Roy not to phone Joanne about the inheritance, when Chet walks into the kitchen announcing that it'll cost $2.25, the small black tape mark is visible on the floor where Johnny and Roy were standing.
Visible crew/equipment: Just before dispatch drops tones for Squad 51 to respond to a heart attack, Johnny's walking past the rear bay door, and we can see the top of the set over the bay door.
Visible crew/equipment: After Roy breaks the window with the chair, the guys place the ladder against the window and Marco starts to climb up. In the next interior shot, just as Roy and Johnny lift the security guard, right outside the window we can see the corner of something else (platform-like), besides the top of the ladder.
Visible crew/equipment: When Squad 51 arrives at the second location, 1511 East Hill, trying to find the correct address for the attempted suicide, the outline of Johnny's lav mic transmitter is visible at the back of his shirt.
Visible crew/equipment: While Early is listening to the heartbeat of the boy with a heart problem, Dixie is standing beside him, and on the glass case behind them we can see movement in the reflection, even though it's only the three of them in that treatment room.
Visible crew/equipment: At the start, when dispatch interrupts the mannequin practice with a structure fire, after the shot of Mike getting into his turnout, as Engine 51 rolls out of the apparatus bay, the reflection of array set lighting and two reflector screens are visible on the moving engine.
Visible crew/equipment: At the site of the back hoe accident, after the ambulance arrives, when the father of the girl who's trapped under the back hoe gets up and starts walking away from Roy, the reflection of set array lighting is visible on the surface of Squad 51.
Visible crew/equipment: During the back hoe rescue, the outlines of Johnny's and Roy's mic transmitters alternate between being visible at the front and sides of their shirts.
Visible crew/equipment: Near the end of the episode, when Charlie hitches up The Boat to his pickup truck and drives it away, the reflection of the array set lighting is visible on the pickup's door.
The Lighter-Than-Air Man - S5-E8
Visible crew/equipment: When Station 51 is on the scene with the overturned truck carrying insecticide, that's causing toxic smoke, Captain Stanley asks dispatch to identify the toxicity of trimelanide, and three shots later a crew member walks onscreen from the left, right behind the overturned truck, then realizes his mistake and backs away.
Visible crew/equipment: When the man who was unconscious for five minutes is wheeled into the ER, Morton has him taken to treatment 2, and when Carol is taking his blood pressure, the actor's tape mark is visible at her feet, under the gurney.
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.