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.
Visible crew/equipment: While the two victims of The Boat wreck are on the ground down below, just as the Coast Guard chopper begins to lower Roy on the line, the cameraman/crew member wearing a grey T-shirt is visible down below on the ground, just past Roy's left shoulder.
Visible crew/equipment: During the rescue of The Boat wreck off Catalina, while John's waiting on the ground with one victim, when Roy and the other victim are in the basket being lifted onto the Coast Guard chopper, the shirtless cameraman/crew member wearing a red cap and shorts is visible down below, under the chopper.
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.
Continuity mistake: When Roy and Johnny are on the Coast Guard helicopter, responding to The Boat wreck with injuries off Catalina, there are a few interior shots of them that are flipped, while they're looking out the windows. The paramedic patches are on their left sleeves, but in the flipped shots the paramedic patches are on their right sleeves.
Other mistake: Over the phone the bookie tells Sidney, "I'm having them pains again. I don't feel so good. Would you call some...," then collapses onto the floor. Then Station 51 is dispatched to "Possible heart attack," and the address is given, along with the apartment number 23. After 51 breaks into the bookie's apartment, soon one of the phones ring and Captain Stanley says, "Let me get this straight. Your name's Sidney, and you phoned in the heart attack, right? Now we're getting somewhere. How come you didn't have the address? What's your last name Sidney?" However, 51 was dispatched to the proper address and even the apartment number. Nobody else knew of the heart attack, and the victim did not phone it in.
Revealing mistake: When Dixie's in the basement asking Gary why the lab is still backed up, the next shot shows the plumber working in the cabinet under the sink, but when it cuts to the next shot the plumber is gone, his tool box is closed, things are different/missing from the counters, and the tables and stools have been turned over with a mess all around, before the explosion even occurs.
Continuity mistake: While 51 is breaking into the bookie's apartment, after Chet uses the axe on certain areas of the door he puts the axe down, and in the shot from inside the apartment Chet reaches in through the hole on the door to undo the chain and remove the bar, but when the door opens there's another new axe mark over the top lock that was not made by Chet.
Continuity mistake: After the bookmaker has had the heart attack, when Captain Stanley bangs on his door, the bookie pulls one of the four telephones onto the floor, and when Roy walks in it ends up lying on the floor between the defibrillator and drug box, leaving three phones on the table. However, in the closeup, when Vince places all the phone receivers onto the bases, there are four phones on the table, plus a notepad suddenly appears on the table, and there are fewer cigarette butts in the ashtray.