You can watch the TV series Tulsa King on several streaming platforms:

• Paramount Plus offers full streaming of Tulsa King with all episodes from both seasons available. They also provide a 7-day free trial for new subscribers

• The Roku Channel supports streaming Tulsa King if you have a Roku device

• Amazon Prime Video allows you to watch Tulsa King either by subscribing to Paramount+ through their channel or by purchasing episodes

• Apple TV also offers Tulsa King via the Paramount+ channel or for purchase

In summary, the primary and most comprehensive source to watch Tulsa King is Paramount Plus, with additional availability on Roku, Prime Video, and Apple TV through their respective Paramount+ channels or purchase options