Visible crew/equipment: When Roy has trouble sleeping in the middle of the night, he gets up, and when he goes to the bathroom sink, there is a fully dressed crew member whose reflection is visible in the mirror, as he moves around and looks through the door window towards the actor. Then 51's tones drop, and in the next shot we see that all the other guys of Station 51 have been lying in their beds, before getting up and putting on their turnouts.
Visible crew/equipment: When Roy and Johnny are driving in the squad, while discussing Roy's last phone call from Susan, Johnny's lack of tact, etc., and particularly as they're being dispatched to the "possible maternity case," in every shot facing Johnny pay attention to the window behind the guys, because we can see a crew member's right hand, wearing a ring, who's holding a rope while he's riding on the back of the squad.
Visible crew/equipment: When Roy and Johnny are with 110 and are on scene at the downed airplane, as they remove the pilot from the aircraft, the silver fire starting canister used for the stunt is visible under the plane, before it becomes engulfed in flames.
School Days - S2-E14
Visible crew/equipment: When Chet is driving the crane at the wrecking yard, just as we hear Captain Stanley say, "Swing it in," we see Marco standing atop the cars, with the moving crane in front of Marco. The position of the camera is at the back of the pile of cars, and there is an outstretched hand at the top of the screen blocking the glare for the camera, which is tilting upwards.
Visible crew/equipment: After the explosions at Rampart, when Dixie runs out of the hospital with the gurney and reaches Brackett, the outlines of the mic transmitter, wire, and even the dark strap (that holds the lav transmitter) around her waist are visible on the back of Dixie's uniform.
School Days - S2-E14
Visible crew/equipment: During the rescue at the auto wrecking yard, when DeSoto says that he's going to get the backboard and the splint, the outlines of the mic transmitter and wire are visible on the back of DeSoto's shirt as he's bending over.
School Days - S2-E14
Visible crew/equipment: When DeSoto puts down the Biophone at the auto wrecking yard, the outlines of the mic transmitter and wire are visible on the back of Gage's shirt as he bends over.
School Days - S2-E14
Visible crew/equipment: At the auto wrecking yard, when Billy is with the man trapped in the car, Gage tosses the tourniquet and bandages to Billy, and when Billy turns around the outlines of the mic transmitter and wire are visible on the back of his shirt.
Visible crew/equipment: When Roy and Johnny are on the high school roof with the unconscious 15 yr old girl, the outline of the mic transmitter is visible on the back of Johnny's shirt when he kneels down and sets up the Biophone, and the outline of the mic transmitter is also visible on the back of Roy's shirt after he places the label on the isoproterenol.
Visible crew/equipment: When Gage and DeSoto are on the football field with Steve, the quarterback, the outlines of both the mic transmitter and wire are visible on Gage's shirt as he helps Steve sit down on the gurney. Then when DeSoto takes Steve's blood pressure, the outlines of both the mic transmitter and wire are also visible on the back of DeSoto's shirt.
Visible crew/equipment: When Johnny is taking Boot's temperature, the uncovered top of the set is visible at the corner behind Marco and Captain Stanley.
Visible crew/equipment: While the guys are sleeping at 12:47 am, the camera moves across the dorm, and just as the camera moves past the brick wall divider beside Roy's bed, it casts a moving shadow at the top.
Visible crew/equipment: When Roy and Johnny pull into the parking space near the car with the toddler inside, as the camera moves we see its moving reflection on the side of the car. Then when the woman says "Certainly something's wrong with him, he's unconscious," as the camera pulls back we can see its reflection in the car window. We can also see the reflection of the large location lighting when Johnny tries to unlock the door with a wire hanger.
Visible crew/equipment: When the attendants wheel the boy who can't breathe into the ER, then stop at the nurses' station so Morton can have a look at him, there are two white tape marks visible on the floor, one is below the base station's tape recorder, where a nurse first stands, and the other is at the side of the main desk, where that same nurse (behind Dixie) stands a moment later.
School Days - S2-E14
Visible crew/equipment: While Dixie, Roy, and Billy are walking away from the nurses' station down the hallway, the outlines of the mic transmitters and wires are visible on the back, center of Dixie's uniform, and the back, right sides of Roy's and Billy's shirts.
Visible crew/equipment: When Johnny walks into Rampart and sees the girl whose father has tetanus, he asks her about musical instruments, and when they walk away to get coffee, the outline of the lav mic transmitter is visible on the right side of Johnny's shirt.
Dinner Date - S2-E10
Visible crew/equipment: When Johnny and Roy help the woman lift her daughter out of the car, and place her on the gurney at Rampart, the outlines of the mic transmitter and wire are visible on the back of Johnny's shirt.
Dinner Date - S2-E10
Visible crew/equipment: After Tommy rides home on his bike, Janet has the seizure, and when Roy and Johnny rush over to her the outlines of the mic transmitters are visible on the backs of both of their shirts, as well as the officer's shirt.
Visible crew/equipment: When Ed tackles with the possible OD at the car wash, the bulging outline of the mic transmitter is visible on the right side of Ed's shirt, above the belt. Then, when the man passes out, the outlines are visible on the sides of Roy's, Johnny's, and Ed's shirts. The mic transmitter's outline is also visible at the back of the deputy's shirt, when he hands Johnny the ID he found in the man's wallet.
Visible crew/equipment: When Roy, Johnny, and the trainee are with the injured man near the lighthouse, the outlines of the mic transmitters and wires are visible on the back, right sides of both Roy's and Johnny's shirts. It is also visible on the back of the trainee's shirt when they place the man in the Stokes.
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.