past crimes of smuggling. The Captain finds out and reveals that because of the gas they've breathed for so long, exposure to sunlight would cause them to age rapidly and die. Dan is then sent to the surface as a means of execution while Ben and Harold are granted an audience with Jill. Whereupon they meet Rev. Jonathan Ives, who had vanished several decades ago from the surface. The Captain is shown to be under the delusion that Jill is his deceased wife Beatrice, who he believes has returned to him. Realising that Ben and Harold are untrustworthy, the Captain decides to allow the Gill Men to sacrifice the two as a means to appease the volcano's wrath. While they await this, Jill and Ives free them and Ives instructs them all on how to escape the city. The three make it to the airlock and trek across the ocean floor to a cave, containing a tunnel that leads to the surface. The Captain and his men pursue them there, but frequent volcanic eruptions cause rockfalls that bury him and his men. Ben and his friends decide to return to the sea and attempt to reach shore on foot. The Captain meanwhile digs himself free and follows the tunnel to the surface, where the sunlight does indeed age him to death. Ben and the rest make it to shore and watch as the volcano erupts, finally destroying the city. Cast Vincent Price as Sir Hugh, The Captain David Tomlinson as Harold Tufnell-Jones Tab Hunter as Ben Harris Susan Hart as Jill Tregillis John Le Mesurier as Rev. Jonathan Ives Henry Oscar as Mumford Derek Newark as Dan Roy Patrick as Simon Herbert as himself (Harold's chicken) Production Shooting took place in the United Kingdom. Charles Bennett says he wrote a good script and AIP wanted him to come to Britain to work on the script but would not pay his way. The script was rewritten in Britain by Louis M. Heyward. Bennett hated the changes and called the resulting film "the worst thing I was ever involved in." According to Susan Hart, Charles Bennett's original script was good but was heavily rewritten. She also says there was tension between producers Dan Haller and his British counterpart George Willoughby. Louis M. Heyward confirms this tension and admits to rewriting the script to add humour; in particular, he says he added the