Kara (Laura Vandervoort) travels to Washington to search for the crystal, but she is captured while breaking into a laboratory and sedated with a Kryptonite-infused truth serum. The dose causes her to relive a prior trip to Earth when she followed Clark's biological mother, Lara (Helen Slater), to the Kent farm. Clark arrives in time to save Kara but, after searing the machine with heat vision, he also falls victim to the serum and sees his mother through Kara's memories.

Season 7 | Episode 6

Allison Mack

as Chloe Sullivan

Annette O'Toole

as Martha Kent

Erica Durance

as Lois Lane

John Schneider

as Jonathan Kent

Kristin Kreuk

as Lana Lang

Michael Rosenbaum

as Lex Luthor

Tom Welling

as Clark Kent