Continuity mistake: When the guys are dispatched to the cardiac patient stuck in the elevator, Gage leaves the mop and bucket in the middle of the floor in the apparatus bay and rushes to the squad, but when they roll out the bay floor is clear.
Continuity mistake: When Roy and Johnny get to the airport and start talking to the boy flying the plane, the clock reads 11:55, but when Frankie puts the oxygen mask on his father it's 12:15, then when Roy reassures the boy about flying straight and level, it's 12:40, and so on, even though it's really supposed to be only a few minutes between these shots.
The Wedsworth-Townsend Act - S1-E1
Continuity mistake: When Dixie and Johnny reach the overturned car at the cliff, the bumper on the car goes from shiny to mud encrusted, and the amount of branches, etc that covered the car decreases significantly, by the time the car falls over the cliff.
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.
Continuity mistake: When the guys decide to eat lunch before resuming CPR practice, Chet puts the CPR mannequin upright beside the fridge. Chet's wearing his regular black shoes, and the CPR mannequin is wearing white sneakers. However, in the close-up of The Mouse crawling under the fridge, the leg we see near The Mouse is wearing a brown rubber firefighter's boot.
Continuity mistake: Just as Gage and DeSoto walk into Rampart's staff lounge, while discussing practical jokes, DeSoto is holding the handy-talkie in his right hand, but in the next shot the handy-talkie has vanished.
Continuity mistake: When Christy walks into Station 51's kitchen, the bag strap is on her shoulder, but close-up it is gone, only to be back next shot when she removes it a moment later.
Continuity mistake: When Squad 51 is dispatched and headed to their destination, interior shots looking out the windshield are shown. It is only in these shots that the Dodge truck's red hood has vents on its right and left sides. There is no such thing in any exterior shots of Squad 51. The hood's style also changes.
Peace Pipe - S2-E5
Continuity mistake: When DeSoto and Gage arrive at the corner shop for the gum ball machine rescue, in the overhead shot the front end of the parked RV is beside the lamppost, but in the next shot half its body is past the fixture.
Continuity mistake: At the stationhouse, when DeSoto and Gage are discussing the detective, in the shots facing Gage, DeSoto holds a cup of coffee in his hands, but in the shots facing DeSoto his cup is on the table.
Continuity mistake: When Gage plays the new game of poker with Kelly, the entire left side of the table is visible as the two begin. Next shot, DeSoto is suddenly sitting at that end, with an additional cup and saucer, opposite Kelly and Gage.
Dinner Date - S2-E10
Continuity mistake: When the paramedics and the rest of the firemen gather round the failed pacemaker patient, their positions change and in DeSoto's close-ups the Captain isn't seen (for the camera angle's sake), although in other shots he's right beside Gage. As an aside, note when Captain Stanley first first gets off the engine and trips in the background.
Continuity mistake: When DeSoto joins Gage at the kitchen table they discuss Gage's bright idea of rodeos. In all the shots facing DeSoto his hands are clasped together with the coffee cup on the table, but in all the shots facing his partner, he's holding the cup of coffee. The magazine ends up under DeSoto's arms between shots as well.
Continuity mistake: During the first two seasons of the show, when Engine 51 and Squad 51 are dispatched, sometimes one or both vehicles change their appearance when they leave the firehouse, while en route, or when they reach their destination. Note the hood, lights, etc.
Continuity mistake: When John first explains how to rescue the little girl in the hole, he wraps his left hand around his right wrist, but in the next shot it's his right hand that's around his left wrist.
Continuity mistake: The shaving foam on DeSoto's face changes between the face-on shots and the reflection shots, and in the reflection he shaved from cheek to chin, but in face-on shots only to the neck.
Continuity mistake: When DeSoto starts to crack about what's upsetting him, Gage places a mop beside another mop, up against the door and it falls over. Next shot both mops are upright and in different positions as well.
Continuity mistake: On the front end of Squad 51's hood, the letters of the word 'DODGE' appear either in silver or in red, or sometimes it's not there altogether.
Continuity mistake: When Johnny is being examined by Dr. Early and Dr. Morton, Roy is in the treatment room with them, and he's not wearing a watch, but when Roy steps into the hallway and speaks to Chet he's suddenly wearing a watch.
Continuity mistake: While Charlie is finishing up on the squad's engine, Captain Stanley hands Johnny the address in the canyon that has overgrown weeds, and when Johnny packs up the toolbox, Charlie holds out the roll of electrical tape and the combination wrench, with its open-end up. However, in the next shot the only thing Charlie holds out is the wrench, but with its box-end up.
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.