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Tonight, CBS shuffles one terrible sitcom onto its schedule in place of another. Although Rules of Engagement (7:30 p.m., CBS/Ch. 2) is probably a tiny bit less horrible than "How to Be a Gentleman."

The network's original plan was to air "Gentleman" on Thursdays after "The Big Bang Theory" and move "Rules of Engagement" to Saturdays at 7 p.m. But, as pretty much anybody who'd seen the pilot could have told the folks at CBS, "Gentleman" was a massive bomb on Thursday nights.

So after it aired twice, CBS canceled production of "Gentleman" (after nine episodes), and announced plans to run the seven unaired episodes on Saturdays. That lasted just one week - after abysmal ratings this past weekend, "Gentleman" is off the schedule altogether.

And "Rules of Engagement" moves to Thursdays at 7:30 p.m. It really is a terrible show, but, somehow, it survives. It's sort of CBS' version of "According to Jim."

In the sixth-season premiere, Liz tries to make her marriage to Russell work; Russell tries to end it.

Elsewhere on TV ...

World Series (6 p.m., Fox/Ch. 13): Game 2 - Detroit Tigers at St. Louis Cardinals

The Big Bang Theory (7 p.m., CBS/Ch. 2): Sheldon's mother is in town, and she drops a bombshell.

Charlie's Angels (7 p.m., ABC/Ch. 4): There's great news about this terrible show - it's been canceled! ABC is just burning off unaired episodes.

High school football (7 p.m., Ch. 14): Cottonwood vs. Alta

The Vampire Diaries (7 p.m., CW/Ch. 30): Matt goes to Bonnie for help.

Project Runway (7 and 11 p.m., Lifetime): The remaining contestants each have to create a mini-collection.

Person of Interest (8 p.m., CBS/Ch. 2): Reese and Finch investigate a judge known for his tough sentences.

Grey's Anatomy (8 p.m., ABC/Ch. 4): Meredith tries to get Derek interested in a patient's rare brain tumor.

The Secret Circle (7:30 p.m., CW/Ch. 30): Faye plots against her ex-boyfriend.

The Mentalist (9 p.m., CBS/Ch. 2): The body of a murdered woman washes up on an island.

Private Practice (9 p.m., ABC/Ch. 4): A woman from Cooper's past visits the practice.

It's Always Sunny in Philadelphia (11 p.m., FX): Everybody but Frank panics in the face of an oncoming storm.

Jersey Shore (11 p.m., MTV): Everybody is sick of Mike. (Season finale)