Throughout the series, the Homicide department is shown as being divided into two shifts of detectives. At the time, the department was divided into three shifts, with each shift covering eight hours of the day.
A couple of times, reference is made to the other shift of the Homicide detectives as being the "night shift". However, at the time, the squads of the Homicide department regularly rotated shifts so that no one group of detectives would routinely have the night shift.
In a number of episodes, in-vehicle shots with a "back seat" perspective often show that the vehicle being filmed in is in fact a Chrysler-produced sedan. Note the older star-in-pentagon emblem on the steering wheel instead of the Chevy Cavaliers that the detectives drive. This is likely due to the lower headroom in the Cavalier, making it difficult to film that perspective.
Numerous times throughout the series Sergeant Howard quickly flips her revolver sideways after loading it, which quickly swings the cylinder closed. However anyone that has received proper instruction on the handling and use of a revolver would know not to close the cylinder that way, doing so can cause the rounds in the cylinder to fly out and jam it when it closes, the proper way is to push it closed with your hand using steady pressure. Most importantly if it is slammed closed the inertia of the cylinder's weight can cause the yoke to bend, if this happens the cylinder can become misaligned and the timing thrown off. This not only causes the revolver to no longer function properly but it is dangerous too. The yoke's function when it comes to timing is to cause the cylinder to rotate a very specific amount when the hammer is cocked to perfectly align the cylinder with the chamber of the barrel. If the timing is off by a large amount the cylinder and cartridge won't line up and the gun won't fire, however if it is off by just a small amount the bullet won't be aligned with the chamber, instead part of it will be against the chamber wall, firing a revolver with this sort of misalignment can literally cause the cylinder to explode. With the bullet being trapped and the energy from the powder igniting having nowhere else to go it essentially turns the cylinder into a small pipe bomb, potentially causing serious (even fatal) injury to the shooter and anyone standing near them.
In a number of episodes detectives are wearing their sidearms while in the interrogation room with a suspect. Which is a major violation of police regulations, law enforcement officers are always required to remove their weapons before going into the interrogation room to prevent the possibility of the suspect attacking them and gaining control of their weapon.