These are Caleb's (recurring guest star Alan Dale) last days as a bachelor, and he's spending them in Las Vegas. Seth and Ryan join him in "Sin City" for the celebration while a reluctant Kristen plans a bachelorette party for Julie back home in Newport Beach. Meanwhile, Marissa and Theresa (recurring guest star Navi Rawat) are learning more about each other, but what Marissa finds out about Teresa could have big consequences.
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