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: At the start, Station 51 and Truck 8 are dispatched to the cardiac patient stuck in the elevator, and we even see Truck 8 roll up in front of the building in the overhead exterior shot, but in the hotel it's 127's guys with 51's.
Continuity mistake: When Johnny explains to Roy how he met Cynthia, he says that he "TX'd for Kirk on B shift," and at the end of the episode we see Kirk, who traded shifts with Chet, and Kirk is even played by the same actor who played 110's Kirk, Tom Wheeler's partner in a previous episode Publicity Hound, and also in the next episode, Crash.
Continuity mistake: After being dispatched to "industrial accident at railroad yard," once they rescue the man from the train car carrying trichlorethylene, when Roy and John are standing beside Engine 51 we can see the empty red disc on the side of the engine covering the real engine company number (127), as well as the American flag sticker on the windshield. Earlier, when they were dispatched, there's no disc or sticker in the closeup of Engine 51 (played by Engine 60).
Continuity mistake: When the guys of Station 51 are dealing with the rescue of the doctor from the radioactive lab, Johnny's, Chet's, and Marco's SCBA cylinders change during this scene while they're all wearing them. Differences such as tall, slim, with a flat top vs short, wide, with a rounded top, and also the writing on the tanks. Marco's even changes between shots, when he exits the lab's doorway.
Continuity mistake: While cutting the shaft where the burglar is trapped, in the close-up of Johnny taking the K-12 from Roy we can see the ladder that Roy's standing on, and when it cuts back to Roy after Cap's closeup, the ladder Roy's standing on has switched around to the opposite way.
Continuity mistake: While Brackett is treating the man who was in a fight, it cuts to Early walking down the hallway, and in the shot from the hallway he's entering treatment 4 which is beside the nurses' station, but in the next shot from inside the room we see he's actually in treatment 2, the one beside the receiving entrance.
Continuity mistake: Before 51's guys rescue the burglar trapped in the air conditioning duct, Vince's helmet has a highly polished and reflective surface, but when Vince reads the Miranda rights he's wearing a different helmet, it now has a matte surface.
Continuity mistake: When Roy tells the other guys of 51 what they need to do to rescue the doctor, once they're in the hot room, in the wide shot Roy's holding the handie-talkie in his right hand as he's gesturing with that hand, but when it cuts to Roy's closeup the HT has vanished from his right hand, as he's still gesturing.
Continuity mistake: When Johnny and Roy go into the radioactive lab, Johnny removes his glove to check the doctor's carotid pulse and when they walk through the doorway both his gloves are off (he's holding them), but in the next shot exiting the doorway both of Johnny's gloves are back on.
Continuity mistake: When the babysitter runs into Rampart with the child who swallowed phenobarbital pills, Brackett picks the boy up and carries him into treatment 5 (window on door), but in the following shots from inside the room we can see they're actually in treatment 2 (windowless door and set up differently). Then after they place the pacemaker Dixie leaves the room, and in the shot from the hallway she's coming out of treatment 5.
Continuity mistake: After Sharon calls out Dr. Early's name in the hallway, because paging him didn't occur to her, when she finds Early they walk into treatment 2 in the shot from the hallway, but in the shot from inside the room they're all in treatment 5, not 2.
Continuity mistake: After John makes a sarcastic comment, while he and Roy are in the treatment room with Dr. Early, Roy takes the squad's oxygen tank with him when he leaves the room, but when he exits the ER to get into the squad, the oxygen tank is gone.
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.