Tonight's must-see: "Bones"

The second season begins with an investigation into a train wreck that claimed three lives, one of them a U.S. senator. In other events, Brennan clashes with her new boss, Dr. Camilla Saroyan (Tamara Taylor), who has a romantic history with Booth; and there are new wrinkles in the cold case of Brennan's parents' disappearance.

Another singer is cut from the competition. Brooke Burke and Dave Navarro host.

Rochelle's father (Jimmie Walker) visits, but he dies of a heart attack while eating dinner. Rochelle then has to help her controlling mother with the funeral arrangements.

Elizabeth Vargas explores seven scenarios for cataclysms that could wipe out civilization on Earth, assesses the likelihood that any of them could occur and looks at ways humans might be able to stop them. They include: a gamma-ray burst caused by the "death" of a star; artificial intelligence running amok; the eruption of a supervolcano; an asteroid strike; nuclear war; a pandemic or bioterrorism; and climate change.

Debut: Jerry Bruckheimer's slick legal drama focuses on a flashy firm that craves the spotlight of trial-of-the-century cases. First up: A high-profile real-estate agent is accused of killing his patrician wife, but Tom (Kerr Smith) trusts his client's story that her death was an accident. Ron: Victor Garber.