[[WMG: The New York Police Department is secretly run by Shane [=McMahon=]]]
This theory comes from [[http://www.tv.com/law-and-order/%3D%3Dofficial-avatar-discussion%3D%3D/topic/287-516622/msgs.html a couple]] [[http://www.tv.com/law-and-order/show/180/this-show-has-been-on-to-long-whos-with-me/topic/287-563891/msgs.html?&user_rating=90&rating_ref_type=101 of posts]] on the tv.com message board for the episode "Avatar." The poster's theory about Shane O Mac belongs in WildMassGuessing.

[[WMG: Jack [=McCoy=] is a [[TabletopGame/DungeonsAndDragons Paladin]].]]
His special mount is his motorcycle. His [[KickTheDog "occasional moral lapses"]] indicate that even though he's a Paladin, the [[SlidingScaleLongName cynicism of the]] Franchise/LawAndOrder [[TheVerse Universe]], he's fallen every now and then... but that's what the spell [[TheAtoner Atonement]] is for.

[[WMG: [[ReplacementScrappy Detective Fontana]] was dirty.]]
This was implied by the writers -- he seemed to have way too much money -- but never explored.

He could've been a NonIdleRich; but given L & O's attitude toward the rich, he would've been dirty anyway.

Perhaps he was dirty in Chicago, and came to New York to dodge Internal Affairs.

[[WMG: Jack [=McCoy=] is the ancestor of [[Series/StarTrekTheOriginalSeries Dr. Leonard McCoy]].]]

[[WMG: Nora Lewin was Dick Wolf's TakeThat to critics]]
His way of saying to those complaining about the show's liberal bias, "You think [=McCoy=]'s a liberal? You ain't seen nothin' yet!"

[[WMG: Detective Briscoe used to be corrupt.]]
Back in the seventies, he was on the [[Film/PrinceOfTheCity SIU squad under Detective Ciello]]. He was prosecuted for corruption, but was acquitted, and remained a detective in the NYPD. All the negative attention, however, drove him to drink. He eventually cleaned up his act, and legally changed his name from Gus Levy to Lenny Briscoe to get away from the ongoing stigma.

[[WMG: The cast of this show got a surprise when ''Series/{{Revolution}}'' happened.]]
They found themselves having to get out of the city, and then having to survive the ensuing chaos. Then some of them get the idea that since "law and order" are effectively dead, they can go after all the guilty people who walked away free and ''make them pay''.

[[WMG: Briscoe either killed his daughter's killer or had him killed.]]
If the above theory, that he used to be on the make, holds, then nothing could've stopped him from exacting some street justice. And then there was that phone call during one episode (I forgot the name). Given his reaction upon finding her body, I'd like to think he had something to do with the killer's death. And if your child was killed, wouldn't you want to personally hunt down the monster responsible?