Ryan (from "Stray") returns and Clark has to save him from Dr. Garner of the Summerholt Research Facility. Meanwhile, Aunt Nell leaves Smallville, and Lex wants to expand the plant but runs afoul of the mayor.
Elenco:
Tom Welling
,
Erica Durance
,
Allison Mack
,
Aaron Ashmore
,
Annette O'Toole
,
Callum Blue
,
Cassidy Freeman
,
Eric Johnson
,
James Marsters
,
Jensen Ackles
,
John Glover
,
John Schneider
,
Justin Hartley
,
Kristin Kreuk
,
Laura Vandervoort
,
Michael Rosenbaum
,
Sam Witwer
,
Samuel L. Jones
.