While attending a fundraiser, Lois witnesses the Green Arrow steal a rare diamond necklace off Martha's neck and vows to find the man behind the costume. Clark 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 enlists Lionel's help in testing Lana's loyalty. This was a reasonably good episode. I liked Lana's blackmail - Lex's test, but there could have been more than one. I enjoyed Michael Rosenbaum and John Glover's preformances as Lex Luthor and Lionel Luthor, respectively. Overall, it was an interesting episode and was really the first one (since the costume party didn't count) to feature someone in some sort of costume. Perhaps this season is starting to pick up.