(W) Steven Grant (A) Steven Perkins, Gabriel Rodriguez. Steven Grant (w); Gabriel Rodriguez, Steven Perkins (a) The-25 year-old secret of the twin corpses is finally revealed, as the CSI team descends into a world of treachery, manipulation, and paranoia. But the case still has one final unsuspected twist, with evidence surfacing that implicates one of their own. Based on the top-rated CBS crime drama.