Given that the radio station where these shows originally air is called RadioSpiral, and is run by Mr. Spiral himself, this episode pays homage to the spiral, with tracks that include “Spiral” in the name, or by acts that include it.

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• Phillip Wilkerson: “Endlessly Spiraling” (The Stars and Afterward)
  
  
• jarguna: “Spirals of Rosemary” (A Peaceful Granular Day)
  
  
• Robert Carty: “Spiral Vibrations” (Microspirals)
  
  
• mindSpiral: “Ecliptic” (The 1 is Silent)
  
  
• Mr. Spiral: “Cold Blue Night 1 – Prelude in Fugue (Machine)” (Edges of Solstice)
  

The live set in the second hour is called Spiral of Fifths and plays on the musical concept of the circle of fifths.