Definitively, the greatest television show that has ever been broadcast on any platform is without a doubt...
The Wire.
This is unimpeachable and I will bring the full nerd fury down on anyone that claims different. TNG is great. GoT is great. Breaking Bad is great. The Sopranos is great. Deadwood is great. I Love Lucy is fucking great.
But no show is so complete, so thorough and developed to even compare to what The Wire did. It's a fully encapsulated, entertaining and provoking tale between some of the most well grown and endearing characters, put into some of the most unique and well thought out stories that nothing else even comes close.
NYPD Blue, Seinfeld, Firefly, Band of Brothers...fuck even Friends all have their places among the Pantheon of Good TV.
But The Wire does what they do, and does it better.
Old Cases alone shines (in the first season even..) as a testament to the creative storytelling and narrative that can be created simply around the word "fuck"...and it doesn't even ham it up. It's sincere and honest.
The Wire is without a doubt the greatest television show of all time and I cannot wait until we see something like it come again.
You can break this down into categories and other shows are going to shine far, far above, but taken outside of any genre, The Wire stands alone.