Colin Farrell, Vince Vaughn, and Rachel McAdams return June 21 for the second season of True Detective. HBO today dropped the first teaser trailer for the new season. Not much revealed obviously, besides Colin Farrell’s 70’s porn ‘stache. That dude looks grimey. And Vince Vaughn in a drama. How’s that gonna work? This season must have called for a really smarmy detective to fill Woody Harrelson and Matthew McConaughey’s shoes.