Tonight’s episode of This Is Us, titled “Our Little Island Girl,”was screened to TCA members 10 days ago in Los Angeles on the annual winter press tour. Reporters were shuttled to several lots that day, including the storied Paramount Studios on Melrose. Paramount’s water tower Before the screening, critics were invited to tour one of the show’s standing sets on a Paramount soundstage. There, cast members Sterling K. Brown (above with reporters), Chrissy Metz and Susan Kelechi Watson took questions from small groups of journalists standing on the astroturf and fake shrubbery in place in front of the house. There are no weeds on the Pearson’s front…