The Stingray crew are about to go on a well-deserved vacation, but have to cancel when two scientists discover a new underground seabed.
| 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 / Prescott (voice) | Commander Sam Shore / Prescott (voice) |
 Lois MaxwellLieutenant Atlanta Shore (voice) | Lieutenant Atlanta Shore (voice) |
 David GrahamAndrews (voice) | Andrews (voice) |