Currently you are able to watch "The Boondock Saints" streaming on Amazon Prime Video, Hoopla or for free with ads on Peacock, Peacock Premium, The Roku Channel, Tubi TV, Pluto TV. It is also possible to rent "The Boondock Saints" on Google Play Movies, YouTube, Microsoft Store, Apple TV, Vuduonline and to download it on Microsoft Store, Amazon Video, Google Play Movies, YouTube, Apple TV, Vudu.
Tired of the crime overrunning the streets of Boston, Irish Catholic twin brothers Conner and Murphy are inspired by their faith to cleanse their hometown of evil with their own brand of zealous vigilante justice. As they hunt down and kill one notorious gangster after another, they become controversial folk heroes in the community. But Paul Smecker, an eccentric FBI agent, is fast closing in on their blood-soaked trail.