S4, E5: After Jonathan's wallet is stolen, Clark uses his super speed to chase after the thief, Bart, aka The Flash (KYLE GALLNER), but is stunned when he cannot catch him. Bart visits the farm and tries to persuade Clark to leave Smallville for a life on the road together, flexing their superpowers. Meanwhile, Lex buys a priceless framed manuscript with Kryptonian symbols, and Clark learns that it contains a mysterious hidden map. However, when Bart steals the manuscript from Lex, he inadvertently puts Clark's life in danger and must make a decision to save Clark or himself.