- Tom Welling (Clark Kent)
- Erica Durance (Lois Lane)
- Cassidy Freeman (Tess Mercer)
- Justin Hartley (Oliver Queen)
Smallville — S7E8
Episode: Blue
Air Date: 2007-11-15
Runtime: 40 min
Overview
Clark hears his mother's voice trapped in Kara's crystal, and releases her. She gives him Jor-El's ring made of Blue Kryptonite, which strips him of his powers.