Project: Destiny

1999: Leaving her infant son behind, a young mother named Cassandra Schofield departs Bolton, seeking a better life amid the lights of London.

2004: Despite the best efforts of the time-travelling Doctor, "Cassie" Schofield dies on Dartmoor, a vampirised victim of the sinister organisation called the Forge.

2021: All grown up, and a nurse at St Gart's Hospital, Thomas Hector Schofield, known as "Hex", meets and becomes a companion to that time-travelling Doctor... but remains unaware that his alien friend knew his mother, and watched her die.

1854: In the Crimean War, Hex takes a bullet, and is seriously injured. The Doctor promises to return him to St Gart's.

2025: Now. In a London ravaged by a deadly contagion... destiny awaits.