The asteroid hasn't hit Earth yet, but it's still on its way -- and many more people become aware of it, thanks to a nuclear threat at home -- as this sci-fi drama starts its second season with "Fall Out." Pentagon official Grace (Jennifer Finnigan) and scientists Liam and Darius (Charlie Rowe, Santiago Cabrera) must adapt quickly to the changing circumstances. Jonathan Silverman, Finnigan's husband, joins the cast as a presidential adviser. Ian Anthony Dale and Jacqueline Byers also resume their roles.

It would seem that being a dancer only can be a help on this series, since being nimble is a definite plus in tackling nature's obstacles with adventurer Grylls. Derek Hough puts that notion to the test in this new episode, as the current "World of Dance" judge -- and former "Dancing With the Stars" regular -- participates in a trek that permits some moments for him to talk with Grylls about the career he's had.

From time to time, archaeologists feel a thrill of anticipation when evidence turns up that apparently dates from a once-great civilization now claimed by the sea, such as what look like underwater pyramids off the coast of Japan. The new episode "Legends of Atlantis" uses cutting edge technology and input from the world's top marine biologists to examine whether at least some of these sightings are, in fact, the real deal, or merely quirky accidents of geology.

This wonderfully arch and often surreal new dramedy continues its run with "Plum Tuckered," a new episode that finds main character Plum Kettle (Joy Nash) struggling with some harsh realities about dating as she enters the final stage of the New Baptist Plan. Elsewhere, Jennifer (Sandra W. Lee) the terrorist causes widespread alarm with her shocking choice of someone thoroughly unexpected as her group's latest target. Julianna Margulies and Adam Rothenberg also star.

Charles Esten ("Nashville") is known for his singing as well as his acting, and in this new episode, he demonstrates his improv skills. He joins series regulars Wayne Brady, Colin Mochrie and Ryan Stiles to turn suggestions from the studio audience into skits and songs devised on the spot. Comic Jeff Davis, a familiar face on this show, also is a guest. Aisha Tyler is the host. Another episode follows.

As his struggle with sobriety continues, Holmes (Jonny Lee Miller) finds the timing ironic as his former sponsor (guest star Ato Essandoh) turns up and needs his help in the new episode "Nobody Lives Forever." The brother of the sponsor is in peril that could turn lethal unless an illegal activity is completed. On the official job, a biology professor's poisoning fuels a case for Holmes and Watson (Lucy Liu). Chelcie Ross guest stars.

On the lush alien world of Pandora live the Navi, beings who appear primitive but are highly evolved. Because the planets environment is poisonous, human/Navi hybrids, called Avatars, must link to human minds to allow for free movement on Pandora. Jake Sully (Sam Worthington), a paralyzed former Marine, becomes mobile again through one such Avatar and falls in love with a Navi woman (Zoe Saldana). As a bond with her grows, he is drawn into a battle for the survival of her world.

Thomas (Dylan OBrien), a teenager, arrives in a glade at the center of a giant labyrinth. Like the other youths dumped there before him, he has no memory of his previous life. Thomas quickly becomes part of the group and soon after demonstrates a unique perspective that scores him a promotion to Runner status -- those who patrol the always-changing maze to find an escape route. Together with Teresa (Kaya Scodelario), the only female, Thomas tries to convince his cohorts that he knows a way out.

A Navy pilot (Owen Wilson) is shot down over enemy territory, and struggles to survive the relentless pursuit of a ruthless secret police enforcer, a deadly tracker, and countless hostile troops. With time running out, the injured pilots commanding officer (Gene Hackman) goes against orders to carry out a desperate rescue mission.

For the past year, rookie CIA agent Matt Weston (Ryan Reynolds) has been eager to prove himself while cooling his heels at an inactive South African post. He gets the chance when Tobin Frost (Denzel Washington), a turncoat operative, is brought to Westons safe house for debriefing. But soon after Frosts arrival, mercenaries attack, and Weston and Frost barely escape with their lives. The two men must join forces and try to stay alive long enough to figure out who wants them dead.

Jason Bourne (Matt Damon) is living in India when he is framed by Russian agent Kirill (Karl Urban) for the theft of millions from the CIA. Kirill begins to pursue Bourne, intending to assassinate him -- but while Bourne and his girlfriend, Marie (Franka Potente), are on the run, a shot meant for him kills her instead. Vowing revenge, Bourne sets out to prove his innocence and bring the culprits to justice, but he has to evade CIA head Pamela Landry (Joan Allen), who is convinced he is guilty.

In April 1945, the Allies are making their final push in the European theater. A battle-hardened Army sergeant named Don "Wardaddy" Collier (Brad Pitt), leading a Sherman tank and a five-man crew, undertakes a deadly mission behind enemy lines. Hopelessly outnumbered, outgunned and saddled with an inexperienced soldier (Logan Lerman) in their midst, Wardaddy and his men face overwhelming odds as they move to strike at the heart of Nazi Germany.

Tough and chiseled Ray Breslin (Sylvester Stallone) knows how to infiltrate a prison -- and bust out of one. His latest job leads to a double-cross, leaving him stuck in a high-tech facility with the worst that society has to offer. Luckily for Ray, he meets Emil Rottmayer (Arnold Schwarzenegger), an inmate who secretly helps him hatch a plot to win his freedom. Only sadistic warden Hobbes (Jim Caviezel) stands in the way of the two men successfully making it out alive.

When Evelyn Salt (Angelina Jolie) became a CIA officer, she swore an oath to duty, honor and country. But, when a defector accuses her of being a Russian spy, Salts oath is put to the test. Now a fugitive, Salt must use every skill gained from years of training and experience to evade capture, but the more she tries to prove her innocence, the more guilty she seems.