I’m rewatching the DC-based version of NCIS, and I noticed that (at least during the older episodes) that there are TV screens behind several agents’ desks, and that they seem to constantly show the fictional ZNN news network.
On occasion, the stories on ZNN tie back to the episode (example: in season 7, episode 14, “Masquerade”, as the team is heading from their elevators to their desks, each on the phone with someone, and each telling the person on the other end not to talk to the press about the potential dirty bomb material that is loose, Zika points is to ZNN, where they’re breaking precisely that story).
However, much of the time the ZNN footage has nothing to do with the episode.
My question: does the show create the footage for ZNN when it remains in the background and has nothing to do with the show, or are they using some actual news footage for the ZNN footage? If the footage is real, is there any record of where it comes from for different episodes? Is it really random, or is it coordinated with the show (I.e., is it linked thematically to the episode it appears in? Alternately, does it tie to the supposed time when the episode is taking place (for example, showing wildfire scenes in late summer/early fall)?)