Having been dethroned by the people of his Eastern nation, El Hudat's twin brother, Ali Khali, arrives in Marineville.
| Actor | Role |
|---|---|
 Don MasonCaptain Troy Tempest (voice) | Captain Troy Tempest (voice) |
 Robert EastonLieutenant George Lee 'Phones' Sheridan / Surface Agent X-2-Zero / Abu (voice) | Lieutenant George Lee 'Phones' Sheridan / Surface Agent X-2-Zero / Abu (voice) |
 Ray BarrettCommander Sam Shore / Sub-Lieutenant John Horatio Fisher / King Titan (voice) | Commander Sam Shore / Sub-Lieutenant John Horatio Fisher / King Titan (voice) |
 Lois MaxwellLieutenant Atlanta Shore (voice) | Lieutenant Atlanta Shore (voice) |
 David GrahamAli Khali / El Hudat / Aquaphibians (voice) | Ali Khali / El Hudat / Aquaphibians (voice) |