Visible crew/equipment: After Johnny and Roy save the man at Vic's party, when they are leaving, the reflections of crew members and production equipment are visible on the orange surface of the ambulance as it drives away.
Visible crew/equipment: Just after Herbert leaves the station in the morning, dispatch sounds the alarms, and when Roy and John are in the squad while the dispatcher begins talking, there are nice reflections of the camera, reflector screen (in the background), and crew members/cameraman who move around, that are visible on the surface of the spotlight. Additionally, the shadow of the boom/mic is perfectly visible on the windshield as it moves down.
Transition - S4-E15
Visible crew/equipment: When the three victims of the accident are all in treatment 2 with Morton, in the wide shot just as Brackett, Early, Roy, John, and Gil walk in, at the top of the screen we can see the boom mic dipping down into view.
Visible crew/equipment: Just as 51's guys are removing the novelist from the car that's filled with carbon monoxide fumes, a crew member's reflection, as well as the screen from production equipment, can be seen on the car's driver side window.
Visible crew/equipment: When Roy and Johnny climb up the open drawbridge, just as they reach the top and see the car dangling off the edge, when Roy says "Boy," the second cameraman is visible behind Roy sitting on the bridge.
Visible crew/equipment: At Vic's party, when Roy and Johnny are walking up the steps of the house (just before seeing Monique), the reflection of the cameraman holding the handheld camera is visible in the door's glass, when he steps backwards as the guys walk in.
Transition - S4-E15
Visible crew/equipment: When Dixie and Carol stand in the ER hallway, talking about the three accident victims coming in and being swamped, there are two tape marks on the floor near their feet, where Carol and the other nurse were standing just before Dix walked over.
Daisy's Pick Blind Date - S4-E7
Visible crew/equipment: After rescuing the injured man from the burning theater, when Roy and John are on the roof getting the stokes with the victim onto 36's snorkel, we can see a crew member's arm/hand, wearing a white patterned long sleeve shirt, standing at the right side of the screen.
Visible crew/equipment: At the apartment complex fire, after Roy removes the ladder from Engine 51, the Pasadena engine rolls up, and when the Pasadena Captain walks toward Captain Stanley, the second cameraman wearing a brown blazer can be seen standing on the very top of Engine 51 to the left, shooting the overhead footage of the Pasadena engine that was just shown.
Visible crew/equipment: When the guys wake up in the morning and walk into the kitchen, the clear reflection of the camera dolly is visible on the oven glass door as it trucks to the right, when the guys see the empty mouse trap.
Visible crew/equipment: When Johnny and Roy are on their way to the parade in The Old Engine, in close-ups facing them, the reflection of a crew member's hand holding camera equipment is visible on the hood of the engine.
Visible crew/equipment: When Station 51 is on scene at the vehicle accident in the canyon, after Marco uses a crowbar to free the driver of the station wagon and he pulls the driver out, a crew member standing behind the FX 6-ft wind machine fan (to blow smoke) are visible in the background beside the other overturned car. As an aside, in the previous and following shots that crew member and wind machine fan are in the same spot where Chet and Johnny supposedly are.
Visible crew/equipment: When Johnny jumps from the third floor ledge onto the lifenet, in the shot of his actual jump we can see a cameraman wearing jeans at the bottom left corner of the screen, who's holding a handheld camera shooting footage while lying on the street. The angle of that footage can be seen just as Captain Stanley shouts, "Gage, you first," and also when they walk the lifenet over to their left, before Cap shouts, "Okay, Roy!"
It's How You Play the Game - S4-E19
Visible crew/equipment: After the man with the herniated lumbar disc is removed from the waterbed and loaded onto the ambulance, when John gets into the squad, the reflection of a crew member is visible in the passenger side wing mirror.
Visible crew/equipment: When Roy drives off in the squad just as Animal Control shows up at the store with the tiger, we can see multiple reflections of array lighting on the vehicle and also the store's windows across the street.
Visible crew/equipment: While en route to the accident, just as we hear the dispatcher inform Engine 51 that the fire is out, in the exterior shot of Squad 51 there's black tape covering much of the lightbar's chrome atop the cab, which vanishes when they roll up on the accident scene.
Smoke Eater - S4-E16
Visible crew/equipment: When Station 51 is dispatched to the 'structure fire', in the shot facing the squad as it starts to roll out, we can see the black tape covering the lightbar's chrome surface atop the squad, which also vanishes at the incident.
Visible crew/equipment: When Station 51 is dispatched to the traffic accident, while en route there's a shot from the POV of the top of Squad 51, and the reflection of the cameraman, who's wearing a yellow shirt, is visible on the lightbar's red dome and chrome surface.
Visible crew/equipment: At the apartment complex fire, when Truck 82 raises its ladder, we can see the second floor balcony behind the rig, and there is a crew member wearing a long sleeved blue shirt and white hat, standing in front of the corner apartment, where there should be smoke pouring out, but there is none. The reflection of the cameraman/crew member wearing a white hat also becomes visible in Truck 82's wing mirror.
Visible crew/equipment: After Johnny cuts the cable holding Lorenzo's locker, when Johnny climbs down the outlines of the mic transmitter and wire are visible on the back of his 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.