An interesting show about corruption is this years episodes of “Endeavor” on PBS Masterpiece Mystery.
This is a prequel series to the John Thaw “Inspector Morse” (Morse’s first name he never wanted used was Endeavor).
It is set in the sixties at the start of his career and shows British law enforcement fighting with internal corruption. If you can take the Brit dialogue, it is outstanding.
I’m a big fan of Endeavor.
I also like Inspector Morris, Foyle’s War, and Sherlock. Generally everything on Masterpiece Mystery except Peroit.
I think they’re doing another season of Foyle’s.