There are numerous pages online where one do searches on the 1948 "Paramount Case".
In as much of a nutshell as possible: Before 1948, the movie companies owned and/or controlled theaters, so that:
20th Century-Fox movies could only be shown in Fox theaters...
MGM movies could only be shown in Metro theaters...
Paramount movies could only be show in Paramount theaters...
RKO movies could only be shown in RKO theaters...
Warner Bros. movies could only be shown in Warner theaters...
etc.
Then came the landmark "Paramount Case" of 1948, which broke up the movie companies from theater ownership, and people could finally see "Wizard of Oz" in their local Paramount theater. (In my home town, the only "big-name" theater was a Paramount. There were other theaters which didn't have movie company names. I'm guessing maybe they got to show non-Paramount movies.)

Nowadays, we are in a situation where...
ABC is owned by Disney...
CBS owns Paramount television...
NBC owns Universal...
Fox, of course, was founded by 20th Century-Fox.
Not to mention the various cable channels each owns.

I'd like to know:
Does NBC currently run any Paramount shows?
Does CBS currently run any Universal shows?
Does ABC currently run any 20th Century-Fox shows?

If not, then I'm afraid we're getting close to the way things were in theaters before 1948.

Modern Family (ABC) is 20th Century Fox.

Last Man Standing premiering on ABC this fall is produced by 20th Century Fox. Apartment 23 also.

Criminal Minds on CBS has multiple producers and ABC Studios is one of them.
How I Met Your Mother is partly produced by 20th Century Fox.

Friends with Benefits on NBC has multiple producers and 20th Century Fox is one of them.

House on Fox has multiple producers and Universal is one of them.

Terrific!
So far, so good. Here's hoping it stays this way.

House on Fox has multiple producers and Universal is one of them.

House is pretty much owned by NBC, there's a big section of the New York store dedicated to it.

There are numerous pages online where one do searches on the 1948 "Paramount Case".
In as much of a nutshell as possible: Before 1948, the movie companies owned and/or controlled theaters, so that:
20th Century-Fox movies could only be shown in Fox theaters...
MGM movies could only be shown in Metro theaters...
Paramount movies could only be show in Paramount theaters...
RKO movies could only be shown in RKO theaters...
Warner Bros. movies could only be shown in Warner theaters...
etc.
Then came the landmark "Paramount Case" of 1948, which broke up the movie companies from theater ownership, and people could finally see "Wizard of Oz" in their local Paramount theater. (In my home town, the only "big-name" theater was a Paramount. There were other theaters which didn't have movie company names. I'm guessing maybe they got to show non-Paramount movies.)

Nowadays, we are in a situation where...
ABC is owned by Disney...
CBS owns Paramount television...
NBC owns Universal...
Fox, of course, was founded by 20th Century-Fox.
Not to mention the various cable channels each owns.

I'd like to know:
Does NBC currently run any Paramount shows?
Does CBS currently run any Universal shows?
Does ABC currently run any 20th Century-Fox shows?

If not, then I'm afraid we're getting close to the way things were in theaters before 1948.

There is a Lawsuit working its way through the Courts right now, and it may go all the way to the US Supreme Court. Several Groups, including the Parent's Television Council, have filed suit claiming that Pay-TV's practice of "Bundling", which requires subscribers to receive (and pay for) certain channels they don't want in order to receive the channels they want to watch VIOLATES US Anti-Trust Laws. If they win their case, Pay-TV Providers will be REQUIRED to offer their Channels on an "A-La-Carte" basis for those who want to get their channels in this manner. :cool:

Today, most (not all) network TV shows have to be produced in-house, such as NCIS for CBS, Law & Order SVU for NBC, and Desparate Housewives for ABC, and Bones for FBC (Fox).