On Arcadia, the Head of the House of Delahaye, the oldest surviving colonist, writes down his thoughts before dying of cancer at the age of thirty-eight. He is worried about the power of the Corporation and how the younger generation has no idea what the corporation can do. He muses that nothing can help unless someone just happens to land on Arcadia by accident.
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- Humanity's Break-out from Earth occurred in the 21st century. (TV: The Waters of Mars, Kill the Moon) A much larger Break-out, the Great Breakout, occurred in 5000. (TV: The Invisible Enemy)
- References are made to the Cyberman invasions, (TV: The Tenth Planet, The Moonbase, The Invasion) the Martian threat, (TV: The Seeds of Death) and the Dalek invasion. (TV: The Dalek Invasion of Earth)
- Delahaye had lived in the Stop before coming to Arcadia. (PROSE: Transit)
- The entire text of the piece at the Doctor Who Reference Guide