In an interview with TV Guide, executive producer Kelly Souders reveals that the couple and their friends go to the City of Sin for their respective bachelor and bachelorette parties the aftermath of which Clark can't remember.
"Clark is impervious to alocohol, but a magical bottle of champagne has been sent by Zatanna, which causes his memory loss," she says. "You see the wild side of everybody."
Challenges of the relationship between Lois and Clark rise to the surface as well. "Let's face it," Souders points out, "it's not easy to be married to Superman."