"Now it can be told. The most guarded secret of the scientist who created Voltes V. The Mystery of Dr. Armstrong. A story of love, hate, patriotism, prejudice, galactic war and chivalry. Who is Dr. Armstrong? Who is the pilot of the mechanical eagle? Who is Gilgon? A Bozanian Warrior or Hero? Solve these mysteries in "The Mystery of Dr. Armstrong" An animated film masterpiece about science fiction that may not stay as fiction for long . "The Mystery of Dr. Armstrong" It's what Voltes V is all about and no Voltes V fan should miss it. The whole family will love it!" - Filipino Theatrical Poster Write Up. Compilation film of episodes 27 through 30 of the 1977 Anime Series Voltes 5. Released exclusively in the Philippines in 1981
| Actor | Role |
|---|---|
 Joonee GamboaDr Hook | Dr Hook |
| DDodo CrisolGeneral Watson/ Prince Zardoz | General Watson/ Prince Zardoz |
| TTato SoccoSteve Armstrong | Steve Armstrong |
 Cris VertidoMark Gordon/Zambajil | Mark Gordon/Zambajil |
| NNoel F. MallongaBig Bert Armstrong/Narrator | Big Bert Armstrong/Narrator |
| CChristine BonnevieJamie Robinson/Lozaria | Jamie Robinson/Lozaria |
| CCelina CristobalLittle Jon/Zandra | Little Jon/Zandra |
| CChito VicenteCommander Robinson/Draco | Commander Robinson/Draco |
 Dido De La PazOslack | Oslack |
| EEdwin DecenteceoGilgon | Gilgon |
| RRoger ChuaBaron Hrothgar's Father | Baron Hrothgar's Father |
| LLynda AcojedoBaron Hrothgar's Mother | Baron Hrothgar's Mother |
| DDennis MesinaBozanian Father | Bozanian Father |
| JJavi GarcíaBaron Hrothgar | Baron Hrothgar |