“Porn: Business of Pleasure” (9 p.m., CNBC): This isn’t smut. It’s a

“Porn: Business of Pleasure” (9 p.m., CNBC): This isn’t smut. It’s a documentary that takes a serious look at the multibillion-dollar adult film industry and how the Internet has begun to eat into its profit margin.

“Dark Blue” (10 p.m., TNT): Remember Dylan McDermott from “The Practice”? He returns to series television in “Dark Blue.” It’s yet another cop show, but they promise it’s a different kind of cop show. Really.