Does television mirror real life, or the other way around?

I was watching a three-part NCIS show the other night and afterward got to thinking that the show seemed to be written to convince the show's viewers that the story line was occurring in real life, and that it was OK. 

The story told of a young Justice Department attorney who was investigating the NCIS agents in the story for committing crimes in their investigations and covering them up.  Now if you follow the story you know that the main star, Agent Gibbs, went to Mexico and assassinated the man, a drug cartel lord, who killed his wife and child with a sniper shot and Agent Ziva David murdered the man who killed her father by throwing him off of a freighter onto the dock.   As a side note, Agent David is an agent of Mossad, the CIA of Israel, who is assigned to the NCIS team as a liaison to Mossad.  Oh and her father is/was the head of Mossad.

The story took great pains to paint the attorney as the bad guy, as a suck up and climber in the Justice Department.  Towards the end, the agents, including the NCIS director, were seen shredding or burning official files.  So as the attorney closed in on arresting Agent Gibbs, the directors of NCIS and Homeland Security went to the attorney's boss at the Justice Department and got the attorney's investigation shut down.

Does this really happen?  Are murders conducted, on our behalf, by federal agents with impunity for the sake of national security?  Do we work hand-in-hand with Israel conducting hidden missions for the security of the nation?  

Those that are marching in major cities all across the nation are asking for more accountability of deaths at the hand of law enforcement.  Doesn't matter if the victim is black, white, or purple.  If you see the protests as just a "black thing", you are missing the point of where we draw the line on what the government can do in the name of our own security.  And we know that "the government" is just a front for the filthy rich.  Just sayin'.