Smallville Season 9 Episode 19 (Smallville s09e19) with title “Sacrifice” airs on Friday, April 30st 2010 at 08:00 pm via The CW Network. In this 19th episode, you can watch Tess breaks into Watchtower, triggering an elaborate security system that Chloe installed, ultimately trapping the two women inside. Meanwhile, Chloe realizes that the Kandorians are downloading information about from the Watchtower server, which prompts her to make a drastic move.