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.
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.
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.
Continuity mistake: When Roy finds Bonnie in the back seat of the wrecked car, Paula's luggage flips itself around and upright between shots.
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.