You've heard of crossover episodes, where one character from one series appears in another, but have you heard of a cross-over cross-network, where a character from a show on a totally different network appears on another show? You probably have, but legendary television producer Dick Wolf does not have it. In fact, it seems pretty much sure that he just came up with this idea, almost 100 years after the invention of television. according to Variety, Wolf tries to create a crossover between his CBS show FBI and one of his NBC broadcasts (Law and Order: SVU or Chicago, no matter), saying "to my knowledge, this has never been done." He admits that "someone can go forward" to tell him that he is wrong, and we The A.V. club are more than happy to provide this service.
In March 2016, Barry Allen of The CW's The flash visited the world of Super Girl, who was on CBS at the time. Years earlier, Fox Ally McBeal had several crosses with ABC The practice. NBC detective John Munch Homicide: life in the street appeared once on Fox The X-Files. The critic originally aired on CBS, but Jay Sherman has already been to Fox The simpsons. Also, speaking of The simpsons, that does not even include joke crosses, like when Rick and Morty from Adult Swim were in a Simpsons couch gag. The fact is that Dick Wolf did not invent that, and the fact that he assumes he acted without doing any research is pretty funny.
Whatever the case may be, Wolf says that CBS and NBC share this idea, although none of them have officially committed themselves. Fortunately, if he needs help, there is many people he can speak with experience about this kind of thing.