Challenge of the Piper (comic story)

Summary
to be added

Characters

 * First Doctor
 * John and Gillian
 * Pied Piper

Continuity

 * The Pied Piper returned in SJA: The Day of the Clown.
 * The Doctor encounters a dragon in the Pied Piper's realm, but uses a fire extinguisher to drive it off.