Unwilling to break the laws of time and interfere with a “fixed point” in history, the Doctor informs Adelaide that he will leave the base on Mars. History has it that the base was destroyed in a mysterious explosion and Brooke and her crew were all killed. Reluctantly, the Doctor comments that she may have a story to tell, and Adelaide agrees. She says that when she was 10 years old, the sky had changed, as it was the moment when the Earth was snatched by the Daleks, and Adelaide says that she saw a Dalek float down to her window, and it saw her and just stared at her, then flew away. Adelaide says that she knew, someday, she would follow it into the stars. The Doctor informs her that this was the beginning of humanity’s furthest exploration of space.