Visible crew/equipment: During the emergency surgery on the boy who was shot with a pellet gun, the wired microphone that is taped to Brackett's shirt with black tape and hidden under his white coat becomes visible when he puts the gloves on, and during the surgery.
Visible crew/equipment: During the rescue of the two guys up on the scaffold, when Gage is putting on his pack and harness, an actor's T-mark is visible on the ground, which Captain Stanley promptly stands upon when he asks Gage if he has his handy-talkie.
Other mistake: When Johnny and Roy are at the house with the three wild, obnoxious boys who terrorized their sitter, Johnny takes her blood pressure with the cuff, while Roy takes her respiration and pulse as he looks at his wrist for the second-hand countdown, but the problem is that Roy isn't even wearing his watch, and the actor has a bizarre look on his face when he looks at his naked wrist. He then tells Johnny that her pulse is 140 and respiration is 35. When the ambulance attendants arrive, Roy is wearing his watch. If he had his watch he should have used it for the pulse and respiration.
Visible crew/equipment: At the scene of the scaffold accident on the side of the building, near the top of the crane, there is a small covered booth that hangs from the crane. We can see the reflection of the hidden second cameraman and his camera in the mirrored windows of the building, as he leans in and out of that booth to film some of the footage we see during this scene.
Continuity mistake: After Squad 51 is dispatched to the 'injured man', when Roy and Johnny get out of the squad, Roy is not wearing his watch as they're walking to the victim while getting hounded by the dog, but in the next shot the watch is back on Roy's wrist as the dog chews on his pants.
Fair Fight - S6-E5
Continuity mistake: When Johnny and Roy are in the ER after the cave-in rescue, while they're talking to Dixie and Brackett, we can see how long Johnny's hair is. After they get back to the station, when the guys decide to name the dog Henry, there's a closeup of Johnny and now his hair is much shorter and even layered at the sides. Additionally, the dirty areas on his shirt change.
Fair Fight - S6-E5
Visible crew/equipment: At Rampart, when Dr. Bracket, DeSoto and Gage are discussing the Hubbards while walking down the hall, two T-marks become visible on the floor behind them when they turn the corner.
Revealing mistake: At World Picture Corp, when John and the guy with the broken clavicle are lowered from the overhead joists they're both wearing lifebelts buckled around their waists. The problem is that once they reach the ground, we can see the additional carabiner attached to John's lifebelt, which is also attached to extra green support protruding from under John's shirt. We can also see the victim's additional carabiner going under his flannel shirt. While Roy is on the line with Rampart, when John removes the victim's lifebelt, the extra carabiner is still protruding from under the victim's shirt and John places his hand over it. (00:27:00)
Visible crew/equipment: At the start, after the boy ties a bowline knot in the rope attached to the van, when the mom gets into the van with her daughter, the reflections of two crew members, the cameraman and the top of the camera are all visible in the vent window, in two shots.
Visible crew/equipment: After Station 51 is dispatched to the back hoe that flipped over trapping the driver, when Roy gets out of Squad 51 upon arrival, the reflections of a crew member and part of the camera are visible on the squad's door.
Continuity mistake: In the bookmaker's apartment, while Roy. John, Marco and Chet are working on the bookie who's in full cardiac arrest, Vince walks in and speaks to Captain Stanley. Then Vince, who's wearing a watch and ring on his right arm/hand, reaches for all the ringing telephones, and one by one he removes the receivers from the bases, but the right arm/hand in the closeup has no ring or watch.
Revealing mistake: At the movie studio, when the actor who plays Dr. Ned is loaded onto the ambulance stretcher, their set's 'fake' window area is the same as Rampart's 'real' hallway later in the episode. We can see this when Brackett, Early and Dix walk down the hallway to kick Dr. Ned's film crew out of his room. Pretty funny to see the same chairs, wall, window with painted exterior backdrop and color stripes on the floor. This area of Rampart can also be seen in the previous episode 'Family Ties', when the clock radio shorts out causing a fire in the patient's room.
Visible crew/equipment: When Johnny and Roy walk into the staff lounge, to join Morton, Brice, and the other paramedics for the tape review meeting, the two actors’ T-marks are visible under the table, where he and Roy are standing.
Visible crew/equipment: When Roy and Johnny respond to The Boat wreck with injuries off Catalina, they pull up to the Coast Guard Air Station, and when Roy joins Johnny on the other side of Squad 51, the moving reflections of two crew members are visible on the back of the squad.
Visible crew/equipment: When Squad 51 is dispatched to 'man unconscious possible heart attack', while en route, two shots after Roy says "It's gonna be a long run," the reflection of the squad is visible on windows they drive past, and we can see the reflection of a crew member who's standing on the back of the moving squad. Slow motion is not necessary to see this. However, if you're into slo-mo you can catch it again later, when John and Roy head to the traffic accident victim.
Visible crew/equipment: When Mr. Laurents visits Station 51, as the guys stand up the actor's T-mark is visible on the floor, between DeSoto and Chet, just before Chet promptly stands at his mark.
Visible crew/equipment: After spending all night on the job, when the tired guys of 51 are at the basketball game, the outlines of the mic transmitters and wires are visible on the backs and sides of 51's jerseys, particularly when Roy gets injured. (00:36:00)
Other mistake: While Charlie is trying to figure out what's wrong with the squad, when Captain Stanley, Roy and John are sitting around the table, there's a can of scouring cleanser which has yellow tape covering the "a" and "x" so all we see is the "ja" on the can, in order to hide its brand name, which is Ajax.
Continuity mistake: When Roy, John, and Marco walk into the rec room while Chet is trying to wax the floor, Marco is wearing a ring on his left hand in the wide shots, but in the closeups with Captain Stanley the ring is gone.
Captain Hook - S6-E8
Other mistake: When John, Roy, and Chet are standing near the stove talking about how much they enjoyed Hookrader's party, there's a can of cleaning powder which has tape swirled around the can to hide the recognizable design and its brand name, which is Ajax.
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.