Should you choose to opt in, you can catch up on shows like The Knick starring Clive Owen, Banshee and catch the upcoming Quarry and Outcast. Cinemax also debuts new movies on the regular, so there's sure to be new stuff to watch when the urge hits. At $10/month, Cinemax is a cheaper add-on than HBO ($15/month), but the extra dough is a price to pay for Game of Thrones, Boardwalk Empire and lots more. If you want to add Cinemax to your Sling TV subscription, you can do so now, and it's available on all devices the service supports.