The Lighter-Than-Air Man - S5-E8
Visible crew/equipment: When Johnny brings in the box and Chet removes the wrapping for the baby layette, note the unfinished set wall past Engine 51 in the apparatus bay, which we can see since the front bay door is open, but when Captain Stanley walks in telling John about the phone call, the front bay door is now closed, then when the tones drop that set wall can be seen once again.
The Lighter-Than-Air Man - S5-E8
Visible crew/equipment: When the trailer that's on fire pulls up to the front of the station, the outline of the mic transmitter is visible on the back of the woman's blouse.
The Lighter-Than-Air Man - S5-E8
Continuity mistake: When Station 51 is dispatched to the truck fire, as Captain Stanley responds to the dispatcher Roy and Johnny get into the squad, but we see Marco, Mike and Chet head back to the kitchen instead of getting on the engine, then we see both the engine and squad responding to the incident.
The Lighter-Than-Air Man - S5-E8
Visible crew/equipment: When Station 51 is on the scene with the overturned truck carrying insecticide, that's causing toxic smoke, Captain Stanley asks dispatch to identify the toxicity of trimelanide, and three shots later a crew member walks onscreen from the left, right behind the overturned truck, then realizes his mistake and backs away.
The Lighter-Than-Air Man - S5-E8
Continuity mistake: At the scene of the overturned truck causing toxic smoke, when Chet talks to the driver and then pops out the windshield, in the wide shots the two windshields are intact and not cracked, but in the closeups facing Chet and the closeups facing the driver there are long cracks in the windshield.
The Lighter-Than-Air Man - S5-E8
Visible crew/equipment: At the scene of the bride and groom's traffic accident, when Johnny asks Crockett if he ever thought about a career as a marriage counselor, the outline of the lav mic transmitter is visible on the front of Johnny's shirt.
Continuity mistake: When Johnny and Roy are at the apartment building with the broken elevator, Roy's watch is gone when they climb the steps, but he's wearing the watch when they enter the apartment, then it vanishes when they head back down. That watch reappears again, disappears and reappears until they go back up to the apartment for the second time.
Visible crew/equipment: When Gage and DeSoto are on their first run (the mother-in-law), they phone Rampart's base station. When Dixie opens the door to answer the call, her mark (strip of black tape) is visible on the floor just as she steps on it.
Other mistake: When the dispatcher calls for Squad 51 about an unknown rescue, Roy almost closes the squad's hood on Johnny's head, and when Captain Stanley responds the usual KMG365 with the hand mic, we can see that the mic's cord is dangling down, not even plugged into the base.
Continuity mistake: When Roy and Johnny are in the backyard with the couple and the mother-in-law, after Johnny gets off the phone with Brackett, he has the black notebook in his left hand, but in the side shot it's in his right hand, then it returns to Johnny's left hand.
Continuity mistake: When Squad 51 heads out on the first call, Roy pushes the tool cart up against the wall map and the rear apparatus bay door is down, but in the next wide shot as they head down the driveway, the tool cart is gone and the rear door is raised all the way up.
Continuity mistake: When Early is examining the boy who had the grand mal seizure in the waiting room, after using his penlight Early puts it back into his pocket just before he examines the boy's ears in the closeup, but in the wide shot that penlight is on the gurney and Dixie picks it up then puts it into her pocket. Yet in Early's closeups the penlight is still in his pocket, and in the wide shots it's gone.
Continuity mistake: When Early examines the boy who had a seizure in the waiting room, Early uses a tongue depressor and his penlight to check the boy's throat. During his examination, in the wide shot the penlight is in Early's right hand and the tongue depressor in his left, but in the closeup they've switched hands. Additionally, in that wide shot Dix is holding the otoscope with her right hand, but in the closeup her right hand in under the boy's head.
Visible crew/equipment: After Brackett tells Donny's mother that her son does not have meningitis, it cuts to an exterior shot of Roy and John driving in the squad, and the moving shadow of the filming vehicle is visible on the ground, in front of the squad.
Continuity mistake: Dispatched to the structure fire are Station 51, Engine 36, Engine 116, and Truck 3. While Johnny and Roy are searching the rooms for the young girl, it cuts to a shot of guys from 9, and later there are also shots of 28's and 19's guys, even though none of their companies were called to this incident. These are shots from previous episodes including 3x7, "Promotion."
Continuity mistake: When Station 51 is dispatched to the landslide, the address is given as 2283 Canyon Road, but when they arrive at the house the address is 4102.
Visible crew/equipment: After Chet falls through the roof at the structure fire, when Truck 3 raises their ladder, we can see the cameraman/camera's shadow just as the ladder reaches the roof.
Visible crew/equipment: When Dixie tells the attendants to wheel Ruthie, the woman who went berserk at the salon, into the treatment room where Dr. Early's waiting, there are two T-marks visible on the floor at Dixie's and Johnny's feet.
Visible crew/equipment: After Station 51 is dispatched to the fire at the marine salvage yard, when they arrive at the scene we can see a second cameraman on his knees beside the camera, as he is shooting footage of the ship from that specific angle, which we see during this scene.
Visible crew/equipment: After the guys rescue the woman who was trapped upside down in the wrecked car, when they load her into the ambulance, the location set lighting is reflected on the glass of the ambulance doors.
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.