Three months later. Lois Lane, the second cousin of Chloe Sullivan, arrives in Smallville trying to find the missing Clark Kent to help her to find Chloe's murderer. After being struck by a mysterious ray, she loses control of her car, and finds Clark naked with amnesia in a cornfield. She brings him to Smallville Medical Center, where Martha is with Jonathan Kent, who has been in an irreversible coma. Martha brings Clark back to the farm, expecting him to retrieve his memory. However, Clark is completely dehumanized, having been taken over by his alter-ego Kal-El, whose mission is to find three Kryptonian crystals to assemble into one. Meanwhile in Paris, Lana Lang has an American boyfriend, a young man named Jason Teague, and is having a good time with him, until things take a turn when she gets hit with a mysterious spiritual force containing the spirit of a long-dead witch. Elsewhere, Lex is struggling to recover from being poisoned as he travels to bring an ancient object retrieved from an excavation in Egypt which Clark/Kal-El is also after and uses his flying abilities to steal the crystal... in midair. Also, Lois visits the imprisoned Lionel to talk with him about Chloe, while Martha has a meeting with an associate of Virgil Swan's, named Bridget Crosby, who gives her a new type of kryptonite to combat Clark/Kal-El. “超人前传”第四季的内容精彩紧凑，在这22集中克拉克寻找三颗克普顿晶体，并阻止那些神秘矿石毁灭地球。克拉克也成为橄榄球明星。拉娜有了新恋情，让克拉克如坐针毡，聪明有主见的露意丝蓝恩来到克拉克的家乡。克洛在本季中挖到世纪大新闻，莱诺洗心革面，莱克斯却进一步沉沦迷失，克拉克也发现了他的天命。@www.55dys.com
