The Transit of Venus

In 2009, The Transit of Venus was released by Big Finish Productions.

Cover blurb
A new adventure for the First Doctor, as read by his companion Ian Chesterton.

The year is 1770, and daring explorer Captain James Cook and his crew on the Endeavour are navigating the Pacific Ocean.

Into their midsts come strangers: the Doctor and Ian Chesterton, who are believed to come from Venus. But the TARDIS is lost to them - along with both Susan and Barbara - and Ian makes an enemy of the ship's chief scientist Joseph Banks.

Why is Banks acting strangely? Could it be that the travellers are not the only visitors from the stars...