Smallville - Season 4, Episode 11
Claiming to be cured, Alicia (SARAH CARTER) is released from Belle Reve psychiatric hospital and arrives in Smallville to rekindle her relationship with Clark. Initially skeptical of Alicia, Clark eventually enjoys having a relationship with someone who knows his secret, but when she wants more, he hesitates -- causing Alicia to use red Kryptonite on him. "Bad Clark" emerges and whisks Alicia off to get married in Las Vegas. Meanwhile, Lana decides to have sex with Jason in order to win him back.