Smallville Season 4 - Episode 6: Transference
Synopsis
Clark is drawn to the state penitentiary by one of the kryptonian crystals, which Lionel is using to switch bodies with Lex. Clark intervenes and Lionel enters his body instead. While Lionel uses his newfound super-powers to regain his lost fortune and alienate Clark's friends, Clark must convince his parents that he is the "real" Clark and reverse the process, while avoiding murderous convicts.
Full Recap
Clark is practicing football when Jason shows up to tell him there a coach coming to check him out, when Clark hears a ringing in his ears. Clark superspeeds to the penitentiary where Lex and Lionel are meeting. Lionel expresses his love and offers his hand, but when Lex accepts it, Lionel gets ready to touch him with a stone. Lionel touches Clark instead when he intervenes, and they find their spirits transferred to the other's body. Clark-in-Lionel is taken back to his cell while Lionel-in-Clark and Lex leave.
Upon arriving at the farm, Jonathan soon inadvertently reveals that Clark has superpowers. In his cell, Clark-in-Lionel discovers Lionel's obsession with Kryptonian artifacts and that Lex's cellmate helped to get it from a Mayan sun god's ruin and decode the symbols. The cellmate warns Clark that Lionel is dying. Lionel-in-Clark accesses his accounts but fails the voice verification test. Lionel begins to move in on Clark's life, dropping off the football team
Clark is trying to persuade Lionel's cellmate Edgar to help him make a phone call but the other prisoners hold him up for money and threaten to kill him if he doesn't pay up. Lionel can't get into the LutherCorp computers since Lex changed the passwords, then starts hitting on Chloe to build her up before dumping on her. Lana is conducting more research on the Countess Thoreau, who may have been her ancestor, and Lionel overhears Lana and Jason talking and checks them out. Then he goes to visit with Clark-in-Lionel and forces him to record the numbers for the accounts or he'll kill Lex. Clark gives up the numbers but the money has been removed by Lex. Lana comes visiting and he hits on her and she leaves in disgust.
Martha visits with "Lionel" in prison and he convinces her he's really Clark. Lionel goes to visit Lex and demand "his" money. When Lex tries to shoot him, Lionel grabs him but Martha shows up to hit him with the kryptonite – when she goes to Lex, Lionel escapes. Martha calls Jonathan to warn him but Lionel gets there first and tries to force him to reveal his weakness. But Edgar gets a call through and tells Lionel to come visit. Edgar reveals that the transference will end and Lionel wants a way to make it permanent – only murder might work, if Lionel kills his own body.
The inmate prepares to kill Clark-in-Lionel and Clark manages to beat him. In the confusion a riot breaks out and Lionel goes off after Clark. But Clark has the rock and hits Lionel-in-Clark. The two switch back and the rock is lost in the mayhem as Lionel sees Clark in a glowing gold light. When the prison guards break up the riot Clark escapes and Lionel goes back to his cell.
Clark tries to put his life back together and reveals he put the Egyptian artifact in the cave wall and there are two other openings. Lionel discovers that somehow the transference cured his liver disease and apparently has no memories of the last few days, and seems to have become a "new man." Lana inadvertently reveals that she's involved with Jason to Clark. Lex is understandably reluctant to meet with Clark but Clark convinces him he's really Clark and Lex has put (most of) it together. Clark asks Lex to help out Edgar, who was framed, and he gets out. It turns out that he's working with Dr. Swann's assistant Bridgette Crosby and he turns the transference-stone over to her.
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