Patrick Cassidy

When Castle and Beckett investigate the killing of a treasure hunter, they discover the case is linked to a mysterious homicide from 1947.

Maggie receives a party invitation so Fran takes her to her favourite beauty salon. Fran gets a job there for an actress.

Pratt gets cold feet when Bettina gets serious about their relationship.

Abby checks out of rehab and finds her way back to the ER.

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.

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.