Visible crew/equipment: When Boot goes missing and 51's guys search for him, Roy finds Boot under the bed in the dorm, and the outlines of Johnny's mic transmitter and wire are visible on the back of his shirt.
Visible crew/equipment: When Boot follows Chet into Captain Stanley's office and the guys follow Boot, the outlines of Johnny's lav mic transmitter and wire are visible on the back of Johnny's shirt.
Visible crew/equipment: After Roy and Johnny help the woman whose hair was caught in the meat grinder, when they're putting their gear back in the squad, the outlines of the mic transmitters and wires are visible at the backs of Johnny's and Roy's shirts.
Visible crew/equipment: When the Battalion Chief, Roy, and Johnny walk into Captain Stanley's office to speak with the officers, two actor's tape marks are visible on the floor in front of the desk.
Visible crew/equipment: When Johnny and Roy are speaking with the Battalion Chief in the apparatus bay, about who could have stolen the money, when they walk forward there are two tape marks visible on the floor behind them, where they were just standing.
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.
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.