You can't sell a script for a show to the show itself. In fact, the staff isn't even allowed to read it for legal reasons (if they happen to conceive a similar idea, they're worried you'll sue them later).
However, an agent could shop your script to other shows to demonstrate that you're able to integrate well into a world you didn't create. It's rather strange: If you want to write for Breaking Bad, you should write a script for The Wire.
You can't sell a script for a show to the show itself. In fact, the staff isn't even allowed to read it for legal reasons (if they happen to conceive a similar idea, they're worried you'll sue them later).
However, an agent could shop your script to other shows to demonstrate that you're able to integrate well into a world you didn't create. It's rather strange: If you want to write for Breaking Bad, you should write a script for The Wire.