Doctor Who - Past Doctor Adventures - 34 - Imperial Moon (5th Doctor)

The year is 1878. Three ships of the British Imperial
Spacefleet have just set course for the moon. The discovery of a
mysterious diary, recalling a seemingly impossible journey, takes the
Doctor and his companions back to a crucial moment in history — and into
certain danger. For the moon of 1878 is far from deserted.

Trapped in a crater teeming with hostile animal and plant life, the
Doctor and Turlough must join the British explorers on a hazardous
journey to battle for their freedom before the long lunar night
descends. For, lurking in the shadows are the Vrall — cunning and
utterly ruthless killers.

With the loss of one of their ships — and their captain — the British
team become embroiled in a struggle to survive that tests duty and
honour to their limits. Meanwhile, Turlough finds himself with Time in
his hands and the Doctor must make a choice that will determine the
future of an Empire — and Earth itself.

Featuring the Fifth Doctor, Turlough and Kamelion, this story takes place between Resurrection of the Daleks and Planet of Fire.