• 
  Jason Charles Miller

  Biff
• 
  Phil LaMarr

   Catman Scrothers (3 episodes, 2016)
• 
  Yuri Lowenthal

   Lord Nortyn / ... (2 episodes, 2016)
• 
  Gina DeVivo

   Em (3 episodes, 2016)
• 
  Tara Platt

   Bryttletoe / ... (2 episodes, 2016)
• 
  Heather Anne Wood

   Viking (3 episodes, 2016)
• 
  Amy Dallen

   Currie / ... (3 episodes, 2016)
• 
  Tom Kenny

   Multi / ... (2 episodes, 2016)

• 
  Jonathan Oldham

  George C.C. Scott
• 
  Orion Acaba

  Nye
• 
  Abbe Drake

  McClintock
• 
  Lauren Francesca

  Watt
• 
  Jocelyn Kelvin

  El
• 
  Dael Kingsmill

  Olivia
• 
  Stephen Lunsford

  Hubble

• 
  Max Weisz

  Goodall
• 
  Jared Rosen

  Planck
• 
  Kyle Walters

  Fermi