David Patrick Green

When Veronica takes the apparently easy case of finding the person who maliciously ran over a senior's dog, she uncovers some startling facts. Meanwhile, she is so desperate for a geek's help breaking into the principal's office that she persuades Mac (recurring guest star TINA MAJORINO) to go to the prom with him. Also, Jackie catches Veronica off guard when she asks for her help getting a job at the coffee place.

When Clark Kent (series star Tom Welling) confronts Bizarro, the last wraith from the Phantom Zone, the ensuing fight causes the dam to break, unleashing a torrent of water. Having just been arrested for Lana Lang's (series star Kristin Kreuk) murder, Lex Luthor (series star Michael Rosenbaum) is submerged under water in a patrol car until a mysterious young woman saves him. Lois (series star Erica Durance) manages to pull Chloe (series star Allison Mack) to safety, but Chloe is pronounced dead at the hospital. And the woman who saved Lex reappears at the Kent farm. Series star Aaron Ashmore appears as Jimmy Olsen, and series star John Glover appears as Lionel Luthor.

Shot in a documentary-style POV, a crime documentary series follows the CSIs for the first 48 hours of an investigation, and we learn why CSI does what they do as they solve the murder of an upscale real estate agent in her glamorous high-rise apartment.

Lex tracks the amnesiac Kara to Detroit, where Lois follows him. An obsessive busboy infatuated with Kara shoots Lex, and Chloe has to determine whether to heal him or not.

When a woman kidnaps two young girls, the SRU's wonder why she zeroed in on these children.