This subject is not a valid source for writing our in-universe articles, and may only be referenced in behind the scenes sections.

Alastair Montague was an eccentric billionaire and owner of ChronosCorp HQ who wanted to build a time machine to travel the universe. However, something went wrong and caused a rift in time and space through which the Cybermen broke through. Montague was potentially killed or "upgraded" as a result.

The Thirteenth Doctor discovered this calamity and sent her companions to help sort out the situation. (NOTVALID: Worlds Collide)

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