Compounding interest

“Dallas” got a nice ratings boost on April 15 with a season-ending double feature that revealed what happened to Pam and who killed J.R.

“Guilt by Association” the first of the evening’s two episodes, was seen by 2.82 million viewers, including 1 million adults between ages 18 and 49, an important demographic in TV ad sales.

“Legacies,” the second hour, drew 2.99 million viewers, including 1.1 million in the 18-to-49 demo. This makes “Legacies” the season’s second most-watched “Dallas” telecast after the landmark “J.R.’s Masterpiece” funeral episode, which drew 3.6 million viewers on March 11.

“Dallas” averaged 2.7 million viewers on Monday nights this year, although DVR users who record the show and watch it later in the week have boosted its weekly average to 3.4 million viewers. “Dallas” averaged 4.2 million viewers on Wednesdays last summer, when there is much less competition on other channels.

TNT has not announced whether it will order a third season, but this week the Hollywood news site Deadline suggested “Dallas” is “a slam dunk for renewal.” Although ratings fell this season, the well-known “Dallas” brand generated strong international sales for the studio that produces the show, Deadline reported.

Name that Tune!

Liars

Forget “Who Killed J.R.?” Here’s the question “Dallas” fans really want answered: What’s the name of the song that kept popping up on the show this season?

You know the song I’m talking about. It was first heard in “False Confessions” when the police arrested Frank Ashkani (Faran Tahir) for Tommy’s murder. The song played again in “Legacies” when Pamela (Julie Gonzalo) planted the gun in Cliff’s trunk.

Here’s the answer: The song is called “Liar” and it comes from a band called The Unknown, a TNT spokeswoman told us yesterday.

The bad news: This appears to be an unreleased track. I can’t find it on iTunes or anyplace else. So if you want to keep hearing it, just do what I do and watch those scenes over and over.

Speaking of “Dallas” music: The song that played at the end of “Legacies,” when John Ross (Josh Henderson) proved again he’s his daddy’s son from tip to tail, is “Come Unto Me” by the The Mavericks. Meanwhile, the terrific tune that appeared at the end of “Love and Family,” when Bobby (Patrick Duffy) took that slow-mo stroll out of Ewing Energies, is “My Time Has Come” by The Bowery Riots.

Cidre Speaks

In case you missed it: “Dallas” producer Cynthia Cidre gives TV Guide the post-mortem on the second season, including her reaction to Victoria Principal’s statement-hear-round-the-world, whether Katherine Wentworth is really dead and those cocaine shoes. Earlier this week, Cidre spoke to Yahoo! about what we might see during a third “Dallas” season, including the possibility that – gasp! – John Ross might build his own house on Southfork.

Divas II

Sue Ellen (Linda Gray) had a good week: Not only did she track down Ken (Lee Majors), turn the tables on McConaughey (Steven Weber) and announce Cliff’s arrest, she also defeated sister Kristin (Mary Crosby) in Dallas Divas Derby’s second brackets competition. Get it, girl.

Killing J.R.

Last December, not long after Larry Hagman’s death, I asked three writers and a director from the original “Dallas” how they think J.R. should die. Now that the character has been laid to rest once and for all, it’s interesting to go back and read their ideas, which aren’t far off base from what ended up happening.

“Drill Bits,” a roundup of news about TNT’s “Dallas,” is published regularly. Share your comments below.