Just checked at http://www.tntdrama.com/ there are articles about signing up with Dish just for this.
Note: Corrected spelling.
To Whom It May Concern:
My wife and I just got rid of cable (yahoo!). My wife then asked me, "Hey, I'd like to keep watching 'Cold Justice,' how do we get TNT?" So, for folks like us with a Samsung Smart TV, how does one get access to specific stations (such as what one could access via Roku, etc) without returning to cable?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic