After a robot probe inexplicably disappears, the Stingray crew is ordered to investigate.
| Actor | Role |
|---|---|
 Don MasonCaptain Troy Tempest (voice) | Captain Troy Tempest (voice) |
 Robert EastonLieutenant George Lee 'Phones' Sheridan (voice) | Lieutenant George Lee 'Phones' Sheridan (voice) |
 Ray BarrettCommander Sam Shore / Sub-Lieutenant John Horatio Fisher / Fragil (voice) | Commander Sam Shore / Sub-Lieutenant John Horatio Fisher / Fragil (voice) |
 Lois MaxwellLieutenant Atlanta Shore (voice) | Lieutenant Atlanta Shore (voice) |
 David GrahamTurata / Marineville Tracking Station (voice) | Turata / Marineville Tracking Station (voice) |