Visible crew/equipment: When Dr. Bracket leaves the treatment room with Jenny, who's being wheeled in the wheelchair, he tells her to see her family doctor just as Dixie exits the door, and the shadow of the moving boom mic is visible on the wall, at the top to the left.
Visible crew/equipment: When Dr. Bracket and Dixie begin to explain to Jenny that she was only hyperventilating, as she sits down in the wheelchair, the actor's tape mark is visible on the floor by the door, just before Dr. Bracket walks over and stands on it.
Visible crew/equipment: When DeSoto calls Gage to where he found the dog, the two actors' tape marks are visible on the floor when Gage sits on his bed.
Continuity mistake: When Peter staggers into the ER because of insulin shock, Dixie walks down the hallway passing treatment rooms 2 and 4, with treatment 2 being beside the nurses' station, and it's the same set-up later when Peter's girlfriend speaks to Dixie in the hallway. However, in prior and subsequent shots of the hallway, it's treatment 4 that's beside the nurses' station.
Visible crew/equipment: After Engine 51 rolls up to the scene of Paula's car accident, when Captain Hammer stands up in the engine's cab, the reflection of production equipment is visible on the engine's chrome spotlight.
Visible crew/equipment: At the start, when Squad 51 rolls up on the car accident scene, in the shot from inside the squad we can see the entire area around the wrecked car, and there's only a utility pole, short wood fencing, and trees. When Roy and John are treating Paula, and then removing her from the car, in the overhead shots as the camera faces the wrecked car and 51's rigs, there's a very large rectangular shadow being cast over the car, which is presumably from a reflector screen facing the front of the car.
Visible crew/equipment: After Squad 51 is dispatched to the cliff rescue, when Roy and Johnny board Copter 10 at Rampart, the reflection of the production vehicle/equipment is visible on the glass surface at the helicopter's nose.
Other mistake: After being dispatched to the heart attack, when John and Roy have cardioverted the V-fib Brackett asks for another EKG strip, and when Brackett lifts the chart paper to read it, it just shows flatlining, no rhythm whatsoever.
Continuity mistake: While Johnny and Roy are standing near the nurses' station, Johnny admits that he promised to take care of Paula's dog, and when Johnny turns his head toward Dixie and Brackett we can see the base station behind him, and in the next shot when Dixie and Brackett walk over, a clipboard has suddenly appeared between the telephone and Biocom EKG unit.
Revealing mistake: After Paula's car door is pulled open, when Roy leans her head back in the shot from behind him, we should be able to see out the right rear window, but the view has been deliberately blacked out from this POV.
Continuity mistake: After Paula's taken in the ambulance, when Roy heads to the wrecked car and pushes the driver's backrest forward revealing Bonnie in the back, we can see that the passenger side door is closed, but in the next shot the passenger side door is wide open.
Continuity mistake: When Johnny's on the Biophone establishing contact with Rampart, there's a closeup of the GE telephone at Rampart's base station, and behind it we can see the tape machine switch is turned to the right, in the 'on' position, but when it cuts to Dixie walking over and responding, the tape machine is not on yet.
Continuity mistake: On scene at Paula's car accident, her houndstooth blazer is lying over the backrest of the front passenger seat, but when Captain Hammer opens the passenger side door it vanishes, then it continues to reappear, disappear, and change position in following shots.
Continuity mistake: After Johnny calls Dixie to inquire about Paula, when Johnny heads to the kitchen and asks which one of the guys wants to take Bonnie home for a couple of days, everything on the table keeps changing depending on the camera angles.
Continuity mistake: After the guys played cards, Johnny's low so he gets to do the dishes, and when Johnny proposes dealing another hand to see who gets the dog, cards appear/change on the table between shots.
Visible crew/equipment: In the treatment room, when Brackett gives the diabetic man an insulin shot, there is an actor's tape mark on floor at Dixie's feet, that we can see under the gurney.
Visible crew/equipment: When Early and Dixie are in the treatment room with Jenny, after Early asks Jenny if she can move her legs, the moving shadow of the boom and mic are visible on the wall behind Dixie.
Continuity mistake: When Roy finds Bonnie in the back seat of the wrecked car, Paula's luggage flips itself around and upright between shots.
Visible crew/equipment: At the scene of Paula's traffic accident, when Captain Hammer stands in Engine 51's cab and tells Marco to get the reel line, the reflection of equipment and set lighting are visible in the chrome surface of driver's side spotlight.
Continuity mistake: When Squad 51 is dispatched to the heart attack, when Roy opens the apparatus bay door John and Bonnie run underneath, and we can see that Engine 51 is not parked in the bay, but in the exterior shot of the squad pulling out the engine is in the bay.
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.