Hollywood is filled with lots of potential for technical mistakes in TV shows and movies. They take advantage of this potential rather often, too.
Then again, it wasn't exactly uncommon for LE agencies to order their S&W TDA pistols without a magazine disconnect safety, either. It was an option for LE to order their S&W's without the magazine disconnect feature.
Could be either one ... who knows?
One of my favorite, and all-too-common, mistakes in TV shows (think low budget technical advisors) is when someone draws their Glock pistol and you can hear the sound of a hammer cocking in the sound track. Nobody ever communicates with the Foley Editors about the sounds that ought to be present in this sort of situation, it seems.
Then, there's the ever-present armed professional character who decides to thumb cock their TDA pistols (like a Walther PPK/S) and then when they decide they aren't going to really 'shoot' anyone, they decock by lowering the hammer while pulling the trigger ... and the decocking lever is just sitting there for everyone to see.
You can also sometimes see scenes where the background is filled with extras, supposedly cops, and one of them is holding a pistol with the highly refined grip technique involving the support hand grasping the front of the pistol ... with the fingers wrapped around the frame & slide, forward of the ejection port.