When the hospital she works at is transported to the moon, medical student Martha Jones joins forces with The Doctor to hunt down an alien fugitive before the oxygen runs out...

博士的塔迪斯被追尾，肇事船居然是泰坦尼克號。原來一家外星旅游公司仿照泰坦尼克號制造了一艘巨大的泰坦尼克號宇宙飛船。但是飛船卻連續遭遇不幸：防護罩被毀，裝上隕石群，船長死去，服務機器人嗜殺成性……。...