Chloe reveals she knows Clark’s secret by helping him enter the caves and witnessing his disappearance, though she keeps this realization to herself to protect him. Production & Impact Air Date: May 18, 2005.
The episode centers on the convergence of the three Kryptonian Stones of Knowledge. As Clark Kent races to collect the stones before Genevieve and Jason Teague can use them for evil, a second meteor shower—far more devastating than the one that brought Clark to Earth—begins to rain down on Smallville. Smallville - Season 4Eps22
" Commencement " transitioned the show from a high-school drama into a more mature sci-fi epic, effectively ending the "Smallville High" era. Chloe reveals she knows Clark’s secret by helping
He finally accepts his Kryptonian heritage as a necessity to save the world, leading to the creation of the Fortress of Solitude in the episode’s final moments. As Clark Kent races to collect the stones
Directed by Greg Beeman, the episode was praised for its cinematic scale and high-stakes "disaster movie" feel.