The Departed (2006)

The Departed is an award-winning 2006 crime thriller directed by Martin Scorsese and starring Leonardo DiCaprio, Matt Damon, Jack Nicholson, Mark Wahlberg, Martin Sheen, Ray Winstone, and Alec Baldwin. I watched it because it's listed in the book 1001 Movies You Must See Before You Die, otherwise that 2 1/2 hour length would've given me pause. It's available on HBO Max.

trailer:

Roger Ebert closes a positive review with this:

I have often thought that many of Scorsese's critics and admirers do not realize how deeply the Catholic Church of pre-Vatican II could burrow into the subconscious, or in how many ways Scorsese is a Catholic director. This movie is like an examination of conscience, when you stay up all night trying to figure out a way to tell the priest: I know I done wrong, but, oh, Father, what else was I gonna do?

The Hollywood Reporter says, "The Departed is a robust piece of storytelling and his best film since Casino in 1995. Everything is rock solid". The Guardian closes a positive review by saying, "Scorsese has hit his stride again, and he has produced something with as much as gusto as his best films of 20 or 30 years back; it grips and shocks and entertains ...". Empire Online says, "Back to the streets and with a stellar cast, Martin Scorsese proves once again that he’s the master of urban storytelling — and of thrillingly violent filmmaking." Rotten Tomatoes has a 90% critics consensus score and an even higher audience rating.