The Barn might not be done with Detective Kavanaugh just yet (or vice versa). Per the Los Angeles Times, in a conference call to talk up his final appearance on The Shield Forest Whitaker said "the possibility is there" for him to return during the FX drama's final season, which starts filming in June. "It's a matter of timing," added Whitaker, who since earning an Oscar as The Last King of Scotland has already lined up at least two films. Indeed, as series creator Shawn Ryan noted, "Forest might be a little popular these days. But nothing is ever impossible."