Enter: The Go-Ray (comic story)

Enter: The Go-Ray was a TV Comic story featuring the First Doctor, John and Gillian.

Summary
On the planet Go-Ray, the First Doctor, Gillian and John are accused by the inhabitants (who move on wheels instead of legs) of depleting their nuclear pile's supply of cardium. But, with a little ingenuity, the Doctor is able to restore their power and is granted freedom in return.

Characters

 * First Doctor
 * John Who
 * Gillian Who
 * Go-Rays

Continuity

 * The Doctor once again finds himself looking for mercury. (TV: The Daleks)