Visible crew/equipment: After Mr. Howarth confronts his son about the pills his daughter took, when Dixie walks up and tells him that he can see Monica, the actor's tape mark is visible on the floor, at Dixie's feet.
Visible crew/equipment: When Roy and Johnny are working on freeing the man trapped in the vehicle, and then when they are taking his vitals, the outlines of the mic transmitters and wires (running up toward their shoulders) are visible on the back of Roy's and Johnny's shirts. The mic transmitter's outline is also visible on the left side of Christy's sweater, below the waistline.
Visible crew/equipment: When Roy and Johnny are walking down the hallway at Rampart, Roy asks Dixie for some supplies, just before Johnny spots Sheila doing uncover work, the two white tape marks are visible on the floor just behind him.
Visible crew/equipment: During the rescue of the unconscious boy stuck within the tree, when DeSoto climbs the ladder to begin chiseling at the tree, the outline of the mic transmitter is visible on the back of DeSoto's shirt.
Visible crew/equipment: When DeSoto and Gage are trying to rescue the unconscious boy stuck in the tree, Gage drills a hole in the tree, and when he reaches down to the oxygen tank and then places the tube in the hole, the outlines of both the mic transmitter and wire are visible on Gage's shirt.
Visible crew/equipment: When Dixie looks for Sally to flush the patient's eyes, she finds her in the hallway, and there are two actors' tape marks on the floor in the waiting room, where Dixie and Mike, the patient's friend, will stand in a moment.
Visible crew/equipment: When Morton is talking with the fireman's widow, DeSoto tells Morton that Early wants to see him, and when Morton walks through the door DeSoto's foot moves, and we see the actor's black tape mark on the floor by his foot.
Visible crew/equipment: After Brackett tells Jenny that they may have to put Koki down, Dixie walks into Jenny's isolation room, saying that they have the latest lab report, and the actor's tape mark is visible on the floor at Dixie's feet.
Visible crew/equipment: At the nurses' station, Early asks Dixie about Carol, and when Dr. Knott pulls away in the wheelchair to go get Carol, the actor's tape mark on the floor is visible, precisely where Brackett had been standing moments ago.
Visible crew/equipment: When Early walks over to the nurses' station after removing the boy's stuck finger from the steering wheel, the two actors' tape marks are visible on the floor, where Brackett stands and where Early is about to stand.
Visible crew/equipment: When the babysitter runs into Rampart carrying the boy, both Dixie and Brackett are standing at the nurses' station talking and an actor's white T-mark is visible at Dixie's feet.
Visible crew/equipment: Just as Dixie lets the unconscious teenager's parents walk into the ER treatment room, the actor's T-mark is visible on the floor behind Gage's legs, a moment before Brackett stands at the mark.
Visible crew/equipment: When Early and Brackett try to deal with the elderly group who want to see their friend, as the group walk away toward the waiting room, two actors' T-marks are visible on the floor, one of them is at Dixie's feet, the other beside her.
Visible crew/equipment: When Brackett and Early are in Rampart's staff lounge discussing J.P. Dumont, Brackett agrees to let Early use his charm in the case, and when Early stands up an actor's small T-mark is visible on the floor, where Brackett was standing moments earlier.
Nurse's Wild - S1-E7
Visible crew/equipment: After rescuing the man trapped at the chemical plant, DeSoto and Gage walk into Rampart and when Gage walks up the hallway with Ellen, the actor's black tape mark is visible on the floor, where Gage stops to flirt with the nurse.
The Wedsworth-Townsend Act - S1-E1
Visible crew/equipment: After Gage learns of the death of his last rescue, when he leaves the ER treatment room and passes the wife and daughter, the actor's black tape mark is visible on the floor, at the wife's feet.
Cook's Tour - S1-E4
Visible crew/equipment: When Engine 68 pulls into the site with the suicide who has changed his mind, there is an actor's T-mark on the ground behind DeSoto, as he puts on his jacket.
Cook's Tour - S1-E4
Visible crew/equipment: When Engine 51 returns, after Gage and DeSoto have finished their beef bourguignon, as they walk into the kitchen the actors' black marks are visible on the floor, where they are about to stand.
Cook's Tour - S1-E4
Visible crew/equipment: When Jay walks into the ER treatment room, where his unconscious brother has possible brain damage, two white marks are visible on the floor, behind Dixie, and another couple of marks will become visible as this scene continues.
Cook's Tour - S1-E4
Visible crew/equipment: At Rampart, after the baby's birth, when Gage and DeSoto walk over to Dixie, the first actor's T-mark is visible on the floor just before Gage stands there, and a second actor's mark is visible under the stool, where DeSoto will be seated in a moment.
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.