Can a Luthor Change His Spots? (1) - S3.E3

When Lex Luthor turns up at the Daily Planet, he claims to be reformed. He is made science editor by Perry White. Jimmy sneaks into Luthor's laboratory in the Daily Planet and discovers a lightning machine. Luthor claims he built it as a security system for the building. Jimmy, however, continues to distrust Luthor. He becomes even more convinced when he sees Luthor robbing a bank vault and endangering Perry White.