Ep 4 Arrow

While attending a fundraiser, Lois (Erica Durance) witnesses the Green Arrow (Justin Hartley) steal a rare diamond necklace off Martha's (Annette O'Toole) neck and vows to find the man behind the costume.

Clark (Tom Welling) does some investigating of his own and discovers Oliver Queen is the Green Arrow and has been stealing from the rich and giving to the poor. Meanwhile, Lex (Michael Rosenbaum) enlists Lionel's (John Glover) help in testing Lana's (Kristin Kreuk) loyalty.