By the Skin of the Dragon's Teeth - S1.E5

Lex Luthor buys the Great wall of China and invites Lois, Jimmy, and Clark to China for an exclusive interview. They head to an excavation site beneath the Great Wall. Using explosives, Lex creates a cave-in. Lex wants Superman to tunnel under the wall to save everyone at the cave-in site. When Superman does so, he discovers the ancient treasure of the Dragon King. Lex steals a jeweled tooth from a stone dragon, but unexpectedly brings the statue to life. Superman must work with Lex Luthor in order to stop the dragon.