Volcano was one of four audio adventures released by Power Records around 1974, featuring the characters from the Planet of the Apes TV series. Unlike the other three, this story was not released as a stand-alone "Little LP" issue, but rather was held back for inclusion only on an LP compiling the four TV-based stories together.

The other, previously-released stories included on the album were:


Gorilla-chimp rivalry has reached a critical point when Zaius is visted by Dr Pandera, an expert in earthquakes and volcanic activity. She warns him that the Mount Praylox district is under urgent threat of disaster and should be evacuated immediately. Zaius reminds her that Praylox is a gorilla stronghold and they may not obey him. Meanwhile Urko and his next-in-command Captain Soma are plotting to depose Zaius and take over Central City. The three fugitives are travelling through Praylox and visit a human village there. A chimp sent by Zaius warns the people to flee Praylox but he is killed by Soma, who tells them it is only a trick by Zaius. When the earth starts to shake, Pete tells the humans they have to leave. He is recognised by Soma and is about to be arrested when Mount Praylox suddenly erupts and both the humans and the gorillas are forced to run for their lives. Galen tells Virdon and Burke that after this the gorillas will have to see the error of their ways and to trust Zaius.

Mounatin of The Delphi

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Planet of the Apes (TV Series)
Main Characters
Alan Virdon | Peter Burke | Galen | Urko | Zaius
Supporting Characters
Aboro | Anto | Arn | Augustus | Bandor | Barlow | Carsia | Daku | Dalton | Farrow | Fauna | Gahto | Hurton | Jillia | Jones | Kava | Kira | Kraik | Leander | Leuric | Lucian | Miller | Olam | Perdix | Polar | Remus | Scientist | Sestus | Tolar | Veska | Chris Virdon | Sally Virdon | Wanda | Yalu | Zako | Zandar | Zantes | Zilo | Zon | Zoran
Alpha Centauri | Farrow's Shelter | Central City | Borak | Chalo | Delphi | Hathor | Kaymak | Numai | Trion | Venta | Oakland | San Francisco | Council
Escape from Tomorrow | The Gladiators | The Trap | The Good Seeds | The Legacy | Tomorrow's Tide | The Surgeon | The Deception | The Horse Race | The Interrogation | The Tyrant | The Cure | The Liberator | Up Above the World So High
Unmade Episodes
Episode One | Episode Two | A Fallen God | Hostage | The Trek| Freedom Road | The Mine | The Trial
Annual / Comic Strips
Brown & Watson 'Planet of the Apes' Annual, 1975 | Brown & Watson 'Planet of the Apes' Annual, 1976 | Brown & Watson 'Planet of the Apes' Annual, 1977 | Pit Of Doom | The Arsenal | Ship Of Fools | Raiding Party | A Promise Kept | Blow For Blow | Breakout | Depth | Flight From Terror | From Out Of The Past | From Out Of The Sky | Galen's Guerrillas | Journey Into Terror (Brown & Watson) | New Life... On The Old Planet | Power Play | Rockets | Swamped | The Beach Of Time | The Captive | The Circus | The Gods Of The Stars | The Marksman | The Master Of The Forests | The Prophet | The Scavangers | The Wandering Jew | The Zombies | Ultrasonic | When The Earth Shakes | When The Ghosts Walk
Planet of the Apes Encyclopedia: The Legacy | Planet of the Apes Encyclopedia: The Surgeon | Planet of the Apes Encyclopedia: Tomorrow's Tide
Audio Episodes
Volcano | Battle of Two Worlds | Dawn of The Tree People | Mountain of The Delphi | Values