• 
  Steven Mackintosh

   Narrator (2 episodes, 2014)
• 
  Peter Merlin

  Self - Aeronautical Historian
• 
  Jim Nowlin

  Self - Pilot
• 
  Zach Tolby

  Self - Meteorologist
• 
  Kelly Redmond

  Self - Climatologist
• 
  David Hinton

  Self - Associate Director, UAS Technologies, NASA
• 
  Russell Holtz

  Self - Glider Pilot
• 
  Andrew Mathers

  Self - Engineer

• 
  Tom Davey

  Self - FloWave Manager
• 
  Richard Gage

  Self
• 
  Guy Gratton

  Self - Aeronautical Engineer
• 
  Frank Greening

  Self - Research Chemist
• 
  Andy Griffiths

  Self - Former Detective Superintendent, Sussex Police
• 
  Mike Hartshorne

  Self - Forensic Analyst
• 
  Christer Holmgren

  Self - Journalist

• 
  Arthur Ingram

  Self - Historian
• 
  William J. Birnes

  Self - UFO Expert
• 
  Bill Schroeder

  Self - Flight Instructor
• 
  Jeffrey Meldrum

  Jeff Meldrum
• 
  Jason Payne-James

  Self - Forensic Physician
• 
  Charles Paxton

  Self - Statistical Ecologist
• 
  Terje Lofthus

  Self - Plant Manager