• 
  Neil Brand

  (unknown episodes)
• 
  Rick Wakeman

  el însuși
• 
  Patricia Hammond

   Herself - Singer (2 episodes, 2015)
• 
  LaLa Brooks

  Self - Singer, The Crystals
• 
  Thomas A. Edison

  Self
• 
  Tom Moulton

  Self - Producer
• 
  Hank Shocklee

  Self - Producer, Public Enemy
• 
  Brian Wilson

  Self - The Beach Boys

• 
  Aleksander Kolkowski

  Self - Stroh Violinist
• 
  Matt Ross-Spang

  Self - Engineer, Sun Studio
• 
  Steven Van Zandt

  Producer
• 
  Steve Albini

  Pixies
• 
  Duncan Miller

  Self - Recording Expert
• 
  Dave Roe

  Self - Bass Player
• 
  Greg Milner

  Self - Writer and Critic

• 
  J.M. Van Eaton

  Self - Drummer
• 
  Bruno Ellingham

  Self - Producer
• 
  Paul Israel

  Self