Continuity mistake: When Roy and Johnny are with the boy who is trapped on the crane, Johnny buckles the life belt around the boy's waist, and in the following shots the belt's direction flips around to the opposite way repeatedly. Note its stitched leather and tongue buckles.
Other mistake: When Roy and Johnny are with the guy who somersaulted off the roof into the pool, Johnny is in the pool giving him oxygen, and in the closeups Johnny's left hand varies between very hairy, not hairy at all, normal fingernails and bitten up fingernails. Additionally, the hand holding the mask on the boy's face changes back and forth between Johnny's left and right hand, between shots.
Continuity mistake: At the start, when Station 51 is dispatched to the fire and explosion, in the overhead wide shot we see Gage getting into the squad on the passenger side, but in the closeup Gage is in the driver's seat, and when they arrive at the scene it's DeSoto who's driving.
Continuity mistake: Having trouble sleeping, Roy gets up in the middle of the night at the station, and when he puts on his turnout trousers his right suspender becomes unfastened at the front, and hangs down the back of his leg when he walks into the bathroom. However, in the next shot as he enters the bathroom the suspender is properly fastened.
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.
Visible crew/equipment: At the morning lineup, when Captain Stanley walks out of his office the actor's small, black tape mark is visible on the floor where he stands.
Visible crew/equipment: After Johnny and the trainee run off to catch the purse snatchers, when Roy tells the officer which way they went, the outline of the mic transmitter is visible on the back of Roy's shirt.
Visible crew/equipment: When Roy and Johnny are with the nun, and Chet is helping with the kids on the school bus, the bulging outlines of the mic transmitters and wires are visible on the backs of all their shirts.
Visible crew/equipment: When the burned man is wheeled down the hall in Rampart shouting, "I'll sue you too," the actor's black tape mark is visible on the floor between Brackett and Johnny, just before Early steps on his mark. Additionally, another tape mark was visible a moment earlier, where Early stood before walking over to Johnny and Brackett.
Peace Pipe - S2-E5
Visible crew/equipment: When Roy and Johnny are with the boy whose finger is stuck in the gumball machine, the outlines of the lavalier mic transmitters are visible on the backs of Johnny's and Roy's shirts.
Visible crew/equipment: When all the guys are on the roof trying to rescue the unconscious man on the scaffold, the outlines of the lav mic transmitters are visible on the backs of Johnny's and Captain Stanley's shirts, as well as the back of the other scaffold worker's shirt.
Visible crew/equipment: When Johnny and Roy are trying to get the boy with Meniere's Syndrome out of the treehouse, the bulging outlines of the mic transmitters are visible on the backs of Deputy Pauling's, Roy's, and Johnny's shirts.
Visible crew/equipment: When Station 51 is dispatched to the movie studio, during the rescue of the injured stunt guys, the bulging outlines of the mic transmitters and wires are visible on either the backs or sides of Chet's, Roy's, and Johnny's shirts.
Visible crew/equipment: When the deputy arrives at the scene of the overturned tractor, the reflection of set equipment is visible at the hood of his vehicle, over the tire.
Visible crew/equipment: When Roy and Johnny are treating the man under the tractor, and subsequently Dr. Knott, the outlines of the mic transmitter and wire are visible on the back of Johnny's shirt.
Visible crew/equipment: Amid the possible threat of fire from wind shift, when Johnny and Roy rescue the unconscious hiker (John Travolta), the bulging outlines of the mic transmitters are visible on the backs of Johnny's and Roy's shirts, and also the second hiker's shirt.
Visible crew/equipment: When Johnny and Roy are trying to get the boy's head unstuck from the small window opening, the bulging outline of the lav mic transmitter is visible on the back of Johnny's 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.