[caption id="attachment_2076" align="alignright" width="219" caption="Smallville Season 9 Episode 17 - Upgrade"][/caption] The next episode of Smallville Season 9 (Episode 17: Upgrade), Lois Lane investigate a secret lab and an explosion occurs. She was saved by John Corben (Brian Austin Green). On the other hand, Clark Kent was exposed to red kryptonite and takes Zod to the Fortress. Tess and Chloe send in Corben to stop Clark from revealing all his secrets to Zod (Callum Blue). This exciting episode will be aired this Friday, April 16, 2010. Witness on this episode when Enemies becomes Allies and Allies Becomes Enemies and super Clark becomes very bad. Watch Smallville Season 9 Episode 17 "Upgrade" here on Telepisodes.com and all of the Smallville episodes here. Here's the promo trailer of this episode: Watch the Smallville episode, it is available in HD.