The superhero Starman is sent by the Emerald Planet to protect Earth from belligerent aliens from the Sapphire Galaxy. The Sapphireans (or "Spherions") kidnap Dr. Yamanaka and force him to use his spaceship against the Earth.
| Actor | Role |
|---|---|
 Ken UtsuiStarman | Starman |
| SSachihiro OhsawaNot listed | Not listed |
 Junko IkeuchiNot listed | Not listed |
| MMinako YamadaNot listed | Not listed |
 Shoji NakayamaNot listed | Not listed |
 Hiroshi HayashiNot listed | Not listed |
 Minoru TakadaNot listed | Not listed |
 Utako MitsuyaNot listed | Not listed |
 Chisako HaraNot listed | Not listed |
| RReiko SetoNot listed | Not listed |
| AAkira TamuraNot listed | Not listed |
| TTomohiko ÔtaniNot listed | Not listed |
 Fumiko MiyataNot listed | Not listed |
| JJōji ŌharaNot listed | Not listed |
| KKami AshitaNot listed | Not listed |
 Terumi HoshiNot listed | Not listed |
 Shinsuke MikimotoNot listed | Not listed |