The sixth season of 30 Rock (7 p.m., NBC/Ch. 30) finally gets under way, and things are back to normal. Which means things are insane.

Tracy is frustrated because he can't frustrate Liz no matter how hard he tries. Kenneth is preparing for the Rapture.

And Jenna achieves infamy as the mean judge on the network's talent competition "America's Kidz Got Singing."

Elsewhere on TV ...

The Big Bang Theory (7 p.m., CBS/Ch. 2): Penny tries to teach Sheldon how to be a better boyfriend to Amy.

Winter Wipeout (7 p.m., ABC/Ch. 4): Obstacles include the Snowboard Half Pipe and Avalanche Alley.

The Vampire Diaries (7 p.m., CW/Ch. 30): Elena, Bonnie and Matt throw a party.

Men's college basketball (7 p.m., KCSG): Utah State at New Mexico State

Bones (7 p.m., Fox/Ch. 13): A message written in human blood is found on a national monument.

The Vampire Diaries (7 p.m., CW/Ch. 30): Damon and Stefan can't agree on how to handle Klaus.

Women's college basketball (7 p.m., BYUtv): Pepperdine at BYU

Rob (7:30 p.m., CBS/Ch. 2): Debut of this very weak new sitcom.

Parks and Recreation (7:30 p.m., NBC/Ch. 5): Leslie goes overboard to draw attention to an important cause.

Person of Interest (8 p.m., CBS/Ch. 2): Carter is dragged into one of Reese and Finch's cases.

Grey's Anatomy (8 p.m., ABC/Ch. 4): The doctors work together to separate conjoined twins.

The Office (8 p.m., NBC/Ch. 5): Dwight travels to headquarters in search of a better job.

The Finder (8 p.m., Fox/Ch. 13): Debut of this OK spin off of "Bones."

The Secret Circle (8 p.m., CW/Ch. 30): Adam asks Cassie to the Fire and Ice dance.

Up All Night (8:30 p.m., NBC/Ch. 5): Regan gets way too competitive on game night.

The Mentalist (9 p.m., CBS/Ch. 2): A high-priced divorce lawyer is found dead on his boat.

Private Practice (9 p.m., ABC/Ch. 4): Addison has second thoughts about having a baby.

The Firm (9 p.m., NBC/Ch. 5): Mitch defends the son of one of the partners at his new firm.