ZATANNA GIVES THE GANG A SERIOUS HANGOVER - After Zatanna sends a magically spiked bottle of champagne to Clark (Tom Welling) and Lois (Erica Durance) for their bachelor/bachlorette parties, the gang blacks out after the toast, only to wake up the next morning and realize they can't remember anything about the night before. While trying to retrace their steps, Lois realizes she lost her engagement ring and drags Oliver (Justin Hartley) back to the Fortune Casino where she thinks she lost it. The two run into Fortune (guest star James Kidnie), the eccentric casino owner, who accuses them of stealing money from him. Meanwhile, Clark tells Chloe (Allison Mack) he has a memory of stealing an armored truck the night before. Christopher Petry directed the episode written by Anne Coffell Saunders.