• 
  Laura Nirider

  Herself
• 
  Steven Avery

   Himself (1 episode, 2015)
• 
  Ken Kratz

   Himself (10 episodes, 2015)
• 
  Brendan Dassey

   Himself (8 episodes, 2015)
• 
  Dolores Avery

   Herself (10 episodes, 2015)
• 
  Kathleen Zellner

  Herself
• 
  Peter Dassey

  Self
• 
  Dean Strang

  Self

• 
  Allan Avery

  Self - Steven's Father
• 
  Stephen Glynn

  Self - Steven's Lawyer (1994-1997)
• 
  Robert Dvorak

  Self - Brendan's Postconviction Lawyer
• 
  Chuck Avery

  Self - Steven's Brother
• 
  Steven Drizin

  Self - Brendan's Postconviction Lawyer
• 
  Jerry Buting

  Self
• 
  Kim Ducat

  Self

• 
  Barb Tadych

  Self
• 
  Sandra Greenman

  Self - Steven's Friend
• 
  Len Kachinsky

  Self - Dassey Defense Attorney