A team of scientists from Sky City Museum, accompanied by Johnny and Rhom, travels to Mercury and succeeds in unearthing the prize of the century - the diamond of King Morlex. Overlooking their find is a statue of Xander, the winged lion and immortal guardian of Morlex Diamond. When they attempt to remove the diamond from its resting place, the statue springs to life, and Johnny must deal with it.
| Name | Type | Role | |
|---|---|---|---|
| Peter Fernandez | Writer | ||
| Sid Jacobson | Writer | ||
| Alan Riefe | Writer |