Patrick Cassidy

While dirt-biking with Pete, Clark falls into a cave and discovers two hidden treasures: ancient Native American inscriptions that hold the key to his identity and a beautiful girl whom he believes to be his soul mate. Desperate to preserve the writings, Clark pits father against son by enlisting Lex's help in stopping Lionel's construction crew from demolishing the cave.

A mysterious woman, Rachel Dunlevy (BLAIR BROWN - "The Days and Nights of Molly Dodd"), visits the Kents and claims to be Clark's mother, prompting them to finally tell Clark what happened after they discovered him in the cornfield that fateful day. Clark learns why his father hates the Luthors, how his adoption was arranged--and who else has rescued Lex from death.

After discovering that Lionel has secretly installed video cameras in the mansion, Lex hires thugs to put surveillance devices in Lionel's Metropolis office. However, the situation gets out of control when Lionel and Martha surprise the interlopers and are taken hostage. Desperate for a way to save his mother without exposing his powers, Clark must access the office from an adjacent tall building--if he can make the leap in a single bound.

After Lionel is shot and wounded, Jonathan is arrested. But Clark and Pete perform their own crime scene investigation and realize that more than one person had the opportunity and motive to harm Lionel--including Lex. Meanwhile, Lana becomes suspicious when her lawyer father, Henry (recurring guest star PATRICK CASSIDY), mysteriously refuses her request to defend Jonathan.

Maggie receives a party invitation so Fran takes her to her favorite beauty salon. Fran gets a job there for an actress who loses a Sheffield audition.

Castle and Beckett must investigate a mysterious case from 1947 in order to solve the present-day murder of a treasure hunter.