Zach Grenier Zach Grenier is the actor who played Renth in the second season episode . He filmed his scenes between Friday and Friday on Paramount Stage 8 and 18 . Among the other television series on which he guest starred in are " The Equalizer " ( 1986 and 1989 , starring Robert Lansing and Keith Szarabajka ) , " " ( 1991 - 2010 ) , " NYPD Blue " ( 1993 and 2000 , with Gordon Clapp and John Fleck ) , " The Practice " ( 2000 , with Bruce Davison ) , " " ( 2001 , with Jay Caputo and James Otis ) , " Without a Trace " ( 2002 , also with Bruce Davison and with Enrique Murciano ) , " The Guardian " ( 2002 , starring Raphael Sbarge ) , " Crossing Jordan " ( 2004 , with Denise Crosby , Miguel Ferrer , and Eric Pierpoint ) , and " Boston Legal " ( 2005 and 2007 , with William Shatner , Rene Auberjonois , Michael Ensign , Henry Gibson , and Matthew Kaminsky ) . He also had recurring roles on the series " 24 " ( 2001 - 2002 , with Penny Johnson ) , " Deadwood " ( 2004 - 2006 , co - starring Jim Beaver , Brad Dourif , Paula Malcomson , Leon Rippy , and Alice Krige ) , and " The Nine " ( 2006 , co - starring John Billingsley ) . Among Grenier ' s most notable film work are ' s " Talk Radio " ( 1988 ) , the thriller " Liebestraum " ( 1991 , co - starring Thomas Kopache and Catherine Hicks ) , the action film " Cliffhanger " ( 1992 , with Paul Winfield and Bruce McGill ) , ' s drama " The Man Without a Face " ( 1993 , with Ethan Phillips ) , the blockbuster " Twister " ( 1996 , with Alan Ruck ) , the crime drama " Donnie Brasco " ( 1997 ) , ' s " Ride with the Devil " ( 19999 , with Michael Owen ) , the action thriller " Fight Club " ( 1999 , with David Andrews , Tim DeZarn , and Matt Winston ) , the drama " Rescue Dawn " ( 2006 , with Pat Healy ) , the horror film " Pulse " ( 2006 , with Joseph Gatt , Brad Dourif , and John Jurgens ) , the comic adaptation " 4 : Rise of the Silver Surfer " ( 2007 , produced by Stan Lee and Ralph Winter ) , and the crime drama " Zodiac " ( 2007 , with David Lee Smith , Matt Winston , J . Patrick McCormack , Thomas Kopache , J . D . Cullum , and Brett Rickaby ) . Further acting credits include episodes of " CSI : NY " ( 2005 , with Robert Costanzo , Aisha Hinds , and Brad Greenquist ) , " Medium " ( 2005 , with Wallace Langham and Victor Talmadge ) , " CSI : Miami " ( 2006 , with Matt McColm ) , " Numb3rs " ( 2006 , with Benito Martinez and Armin Shimerman ) , " Cold Case " ( 2007 , with Ellen Albertini Dow and Carolyn McCormick ) , " CSI : Crime Scene Investigation " ( 2007 , with Wallace Langham , Jessica Collins , and Larry Hankin ) , " " ( 2010 - 2011 ) , and " The Blacklist " ( 2014 ) , as well as the drama " The Loss of a Teardrop Diamond " ( 2008 , with Jessica Collins ) , the drama " Earthwork " ( 2009 ) , the crime drama " J . Edgar " ( 2011 , with Jack Donner , William Bebow , Stephen Root , Gary Werntz , David Clennon , and Manu Intiraymi ) , the science fiction remake " RoboCop " ( 2014 ) , and the comedy " Free the Nipple " ( 2014 ) . Grenier ' s most recent television role is that of managing partner David Lee on CBS legal drama series " The Good Wife " since the show ' s premiere in 2009 . He was promoted to full cast member for the series ' fifth season in 2013 and co - starred on the series with Titus Welliver and with fellow " Star Trek : Enterprise " guest stars Renee Goldsberry and Jeffrey Dean Morgan . More recent projects include the drama " Manhattan Romance " ( 2015 ) , a recurring role on the horror comedy series " BrainDead " ( 2016 ) , and the " Untitled Colin Warner Project " ( 2016 , with Josh Pais , Ron Canada , and Armand Schultz ) .