Academy of Country Music Awards (8 p.m., CBS): What happens in Vegas stays in Vegas — unless

Academy of Country Music Awards (8 p.m., CBS): What happens in Vegas stays in Vegas — unless it’s the 44th Annual Academy of Country Music Awards, which will get beamed straight into our living rooms from Sin City. Reba McEntire hosts.

“In Treatment” (9 p.m., HBO): This is what you might call appointment television — that is if you really want to spend your evenings on the couch with moody shrink Paul Weston (Gabriel Byrne). Season 2 launches tonight.

“The Tudors” (9 p.m., Showtime): No need to lose your head — “The Tudors” is back in action as Henry welcomes Wife No. 3, Jane Seymour (Annabelle Wallis).

“United States of Tara” (10 p.m., Showtime): Tara and her varied personalities face her past in the season finale.