Peace Pipe - S2-E5
Continuity mistake: When Roy and Johnny decide the only choice is to break the glass on the gumball machine, Roy holds the green bottle of soap, but they're both empty handed when they walk back to the squad. When Johnny hands Roy the gloves and the 5-hole hydrant wrench, then start to walk back to the boy, in the next shot the green bottle of soap has suddenly reappeared in Roy's arms.
Peace Pipe - S2-E5
Continuity mistake: When Vince finds the liquor bottle in the drunk driver's car, he says that the driver has a cut, but doesn't think he feels it, and in the next overhead shot we see Johnny and Roy (at the left of the screen) walking away from the car with the drunk driver between them. However, in the next shot the drunk is still in the car, then in the next shot we see them at the front corner of Engine 51 in the background, but then he's back in the car again.
Continuity mistake: During the rescue at the movie studio, when Roy and Johnny wrap the line around the stuntman's waist, Johnny's belt does not go through his pants' back center loop, but a moment later after the wagon falls, when they pull the stuntman up, Johnny's belt now goes through that back loop.
Visible crew/equipment: When Dr. Knott comes back to the ER to see the tractor driver before he's discharged, he walks down the hallway with the nurse, and when he stops near Brackett he looks down at the actor's tape mark on the floor, then steps up to his mark. Then after Dr. Knott experiences chest pains, the two actor's marks in the two spots where Brackett had been standing, are visible on the floor as they walk to the treatment room.
Continuity mistake: When Roy, Johnny, and Chet are cleaning the locker room/bathroom while talking about the models' upcoming visit, dispatch drops tones for 'man trapped in a ditch', and then we see Johnny and Roy coming from the kitchen which is on the opposite side of the firehouse.
Continuity mistake: When Johnny and Roy are with the boy whose head is trapped in the window under the porch, the guys use the Porta-Power to lift the top jamb. When the child gets his head out and his mom tells him to come out from under the porch, the top jamb is straight and level, but when the boy walks away with his mom, the top jamb has lifted itself again.
Continuity mistake: During the structure fire, when Roy walks into the burning house his SCBA cylinder has a large arrow sticker on it, but when he's in the house searching for the boy it's a completely different tank with two red stickers, then when Roy goes upstairs it's back to the original tank.
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: 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.
Visible crew/equipment: When Squad 51 is dispatched to an 'unknown type rescue', after stopping at the side of the road to talk to the two guys, when the squad follows the motorbike, the corner of the crew's reflector screen becomes visible as the squad pulls onto the road and drives off.
Visible crew/equipment: After rescuing the man from under the engine, when Roy and Johnny load him into the ambulance, the reflections of the array set lighting are visible on the ambulance windows, as Johnny and Roy close the back doors.
Visible crew/equipment: When Roy and John are at the bull corral, trying to rescue the guy who's been gored, in the closeups of the bull we can see metal piping at the top, right corner of the screen, as the camera moves.
Character mistake: When Roy and Johnny are waiting outside the radioactive lab, Roy sends Marco and Mike to replace Chet and the captain. When Chet and the captain come out, the captain points to Chet and then points up the hallway, while he says "All right, take off you two," even though it's only Chet who's heading outside to be decontaminated, and he could not have meant, "All right, take off you too," for the same reason.
Visible crew/equipment: A few shots after Johnny informs Brackett of the victim of the radiation incident, there's a shot of the ER with two orderlies pushing a gurney towards the camera, and the two actors' tape marks are visible on the floor at the bottom of the screen, just before Brackett and Dixie stop there, when Brackett tells Dix to notify the radiation security guard.
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.
Visible crew/equipment: When Chet tells Roy that Captain Stanley wants to see him in the office, a tape mark is visible on the floor in front of Cap, just as he tells Roy not to tell the other guys, and then when Roy asks what happened.
Visible crew/equipment: After Roy helps the looter into the squad, when Johnny goes to the motorcycle and finds the leather bag full of jewelry, the mic wires that run from under his shirt/belt into his right pants pocket (with the transmitter bulge) are visible as he bends down.
Visible crew/equipment: After the looter is helped into the squad, just as Roy gets into the driver's seat, the reflection of camera equipment becomes visible on Squad 51's vent window (not to be confused with Roy's arm or the reflection of the red wing mirror).
Revealing mistake: After Squad 51 is dispatched to the motorcycle accident, there are wide shots of the squad driving through the hills, then in the closeups of Roy and John, the squad shakes from side to side to mimic driving, but we can see that the surrounding rocky area behind the squad (matte painting) does not actually change at all.
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.