Hawaii Five-0 & NCIS: Los Angeles - Kensi's Appearance Will Involve the Gov./John McGarrett/Wo Fat Storyline

Got this from interview with Alex O'Loughlin in Australia's TV Week out this week (til Sunday)

"Joe White flies her (Kensi) out because she's an expert lip-reader and she helps us pull some information from footage we find of my [character's] father, Jameson and Wo Fat," he explains. "I thought it was a really interesting cross-pollination because we're not from NCIS and NCIS is not Hawaii Five-0 but it worked. It's great that we can push characters over and back, as long as we make sure that the shows stay true to what they are."

Source: TV Week