CHICAGO FIRE -- 'Better To Lie' Episode 117 -- Pictured: (l-r) Charlie Barnett as Peter Mills, Monica Raymund as Gabriella Dawson -- (Photo by: Elizabeth Morris/NBC) Photo

From: Photo Flash: CHICAGO FIRE's 'Better to Lie'

On CHICAGO FIRE's upcoming episode, titled 'Better to Lie' Treat Williams GUEST STARS-Old emotional wounds are opened when Lieutenant Severide's (Taylor Kinney) father Bennie (guest star Treat Williams) comes to town and clashes with Chief Boden (Eamonn Walker) over the death of their former colleague.