Trouble in Paradise. Joel (Sam Jaeger) and Julia (Erika Christensen)’s marriage has survived career changes, infertility woes, and a complicated adoption. Fans of the supercouple better brace themselves for marital woes in Season 5. “Lost’s” Sonya Walger also pops up as a sexy architect who builds a flirtation with the very married Joel. She will also exploit Julia’s insecurities about being a stay-at-home-mom, according to EW.com. And don’t think that Julia won’t have temptations of her own. EOnline.com dishes that David Denman (“The Office”) may show up as a rugged distraction.