Stingray Season 1 Episode 27 The Disappearing Ships

After a robot probe inexplicably disappears, the Stingray crew is ordered to investigate. Troy, Phones and Marine follow the trail to the base of a volcano, which is about to erupt. However, Troy and Phones are then captured by two survivors of a destroyed city, who tie them up and leave them behind while they head for Stingray so that they can escape the imminent destruction.