smallville when do lex and clark become enemies
Lex Luthor (Smallville) Season three revealed why Lex endured Lionel's harsh parenting; his father blames him for his younger brother Julian Luthor's death, however, Lex took the blame to protect the true killer, his mentally unwell mother Lillian Luthor (Alisen Down), from Lionel's wraith.[12] Also, Lex's curiosity into the symbols (and Clark) leads to a blowout between the two. When Lionel gives Clark a key to a room in the Luthor Mansion where Lex has been collecting information on Clark's family, Clark informs Lex that their friendship "is over".[13] In season four, Lex replaces his father as LuthorCorp's CEO and turns his attention turns toward finding three ancient stones, which contain the same symbols as those in the cave and on the disc.[14] He fails to find all three stones but suspects that Clark did, and used the stones to find the treasure of knowledge they were supposed to have led to, often having confrontations with Jason Teague (Jensen Ackles).[15][16] Around this time, Lex's lifestyle of bedding women and then leaving them the next day would catch up to him when one (Cobie Smulders) that he had previously slept with attempts to kill him.[17]