Revealing mistake: On the roof of the jail, Roy buckles his safety belt around his waist, with an extra belt for the prisoner hanging from it as well. When Roy removes the second belt from his own, we can see two carabiners that are now attached to his lifebelt, which go down into Roy's pants. Those carabiners are presumably attached to extra support under Roy's pants.
Revealing mistake: During the rescue of the two mountain climbers who are stuck on the side of a building, when Johnny and Roy are hanging from the lines which are attached to the lifebelts buckled around their waists, we can also see that attached to their lifebelts are carabiners, which are tucked inside their shirts. Those carabiners are presumably attached to extra support under their clothing. Johnny's is particularly visible, while Roy tries to cover his carabiners with his hand.
Continuity mistake: While Roy, John, Brice, and Bob are standing at the nurses' station, there's a closeup of Brice's arm as he explains that he's checking his drug box, and the watch he's wearing in the closeup has a gold/silver metal link watchband, but Brice is wearing a different style watch, with leather straps and buckle.
Continuity mistake: After Brice completely ticks off John regarding the advisory committee while standing at the nurses' station, when John and Roy walk up the hallway to the receiving entrance Roy's not wearing his watch as he's carrying the drug box, but at receiving he's wearing his watch.
Revealing mistake: When Station 51 is dispatched to "plane that hit building," after they rescue the two aboard the plane, just before the explosion when the orange combustible drum is propelled into the air, we can see the stunt's projectile to get the drum airborne.
Revealing mistake: When Station 51 is dispatched to "accident with injuries," en route one of the camera angles is from the POV behind Roy and John, where the back of the squad is located. The problem is that there's bright sunlight on their backs as they’re driving, when it shouldn't be there. Artistic license is acceptable, but having so much sunlight where it should not be reveals that Squad 51 is not in its normal state.
Continuity mistake: After Roy explains to Mrs. Evans that she shouldn't call them every time Simba runs off, when Chet finds Simba, Johnny holds him with his right hand behind the front legs and left hand under the tail, but closeup Johnny's hands are in the opposite positions.
Continuity mistake: When 51's guys are on the roof of the jail, Johnny sets up the red hose roller with a safety line on the roof edge between the two ladders, but when Roy climbs up the orange ladder to go over the edge, that hose roller with the safety line are not on the roof edge and can be seen still lying on the ground, then it reappears in place in the aerial shot. Additionally, when Roy goes over the roof to make his descent, there's a second silver hose roller at the base of the overhang, which was never actually placed there.
Continuity mistake: At the start of the USC game, after Johnny uses the Heimlich on the choking guy, when Roy asks him to take a deep breath Roy's left hand is on the man's chest, but in the next shot it is Roy's right hand that's on the man's chest.
Continuity mistake: When Early walks into the staff lounge after Johnny's surgery, and joins Roy at the table, Early's holding the cup of coffee with his right hand in the shot facing Roy, but in the shot facing Early he's holding the cup with his left hand.
Continuity mistake: While Early is examining Johnny in the ER, telling Roy about symptoms for ruptured liver or spleen, in the closeup Roy's holding up the IV bag with his right hand, but next wide shot it's held up in Roy's left hand.
Continuity mistake: While Johnny and Roy are driving in the squad, they're dispatched to an 'unknown type rescue', and when they arrive at the incident which is a football player who kicked in his TV screen, Roy's hair is much shorter - note the front and sideburns. Then back in the squad it's the same length as earlier.
Continuity mistake: When Roy and Johnny are leaving the home of the football player who kicked in his TV screen, in the interior shot as they're walking out, Roy has a stethoscope around his neck and is holding the Biophone with his right hand and drug box with his left. In the next exterior shot, the stethoscope is gone and the drug box and Biophone have switched hands.
Continuity mistake: At the start of shift, after Captain Stanley gives the guys assignments, when the last shift rolls up in the squad, in the closeups Roy is suddenly holding his helmet while he and Johnny are talking to Dwyer, but it's gone again in the wide shot. When the squad is dispatched, Roy grabs his helmet which had been lying on the engine's running board in all the wide shots.
It's How You Play the Game - S4-E19
Continuity mistake: While Johnny tells the other guys that the losers of the baseball game, between 51 and 36, will have to pay for the entire cost of the picnic, Chet's eating an apple which has less eaten by the time he tosses it into the garbage.
Continuity mistake: After the OD is dropped off and left at the ER, during her examination Brackett finds the marks on her foot, and in the closeup the marks have moved and are more pronounced than in the wide shots.
Continuity mistake: During this episode Brackett is wearing a tie with white, light blue, and dark blue broad stripes, which should be tied in an identical manner in consecutive shots, but it's not. One example is when Brackett examines the tree surgeon, but when he waits in the hall with Morton and Dixie while Malcolm takes x-rays, Brackett's tie is tied differently, and when he walks back into the room the tie reverts back.
Continuity mistake: When Roy's injured during the warehouse fire and is carried out, in the closeup he and Johnny are not wearing their turnouts, but in the next wide shot Johnny's suddenly wearing his turnout again as he contacts Rampart via Biophone.
Continuity mistake: When Johnny walks into the office to drop off the trash bin, he sees the Chief's clock on the wall and it reads 2:09, but when Johnny brings the clock to Captain Stanley and he gives it to Chet to hide, the clock's hands read 6:44. And when they're all dispatched, the timeout is 14:15.
Continuity mistake: When Karen asks Roy and John for an evaluation of that morning's run, a coffee cup suddenly appears near her arm, which promptly disappears, until Roy soon places his coffee cup near her arm when he sits down beside Karen.
Answer: It is standard practice to wet down driveways so that they stand out in a long shot.
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