Warner Bros. Television

There are two Clark Kents. One is the young man whose life in a tiny Kansas town sets him on destiny's path. The other is Bizarro who shares Clark's DNA but not his values. Only one of them can survive. This season includes the arrival of Clark's cousin Kara/Supergirl. Plus, Lana Lang might prefer Bizarro to the real deal and Lois Lane makes a career leap. Chloe Sullivan finds that balancing a meteor power with a personal life isn't easy. Lex Luthor's...

Single working mom Christine Campbell is getting along better with New Christine. Christine struggles to hold it together with various romances, her brother plans for a new focus in life, the meanies at school continue to harass Christine, and she gets a crush on her son's fourth grade teacher.

The greatest super heroes of all time team up in the 21st century to battle intergalactic villians. Martian Manhunter comes to Earth to warn of an impending alien invasion. With the help of Superman and Batman, he enlists the world's greatest heroes to fend off the unstoppable invading force.

An inner-city teenager from Philly is sent by his mother to live with his relatives in Bel-Air, and everybody is in for a surprise. This season, Will meets Lisa, falls in love, gets engaged, and elopes. Carlton finds his soul sister through online dating. In one of the series' most memorable episodes, Will grapples with a bullet with his name on it.

Alien spacecraft with humanlike passengers have come to Earth. They say they come in peace for food and water. The water they find in our reservoirs. The food they find walking about everywhere on two legs.

A school year makes all the difference for half-brothers Nathan and Lucas Scott. Now they bond as brothers. To protect those he loves, Lucas moves in with Dan. Brooke and Peyton mend their friendship and begin a year of romantic turmoil for both. Nathan and Haley's marriage frays. Newcomers to Tree Hill High push emotions into high gear. In the background is the vindictive Dan Scott, controlling others like an evil puppet master. But there are some...