Hitchemus

Hitchemus was a planet which orbited the G-type star Chara. A day lasted for twenty-two hours with no more than six hours of darkness. It was seven-eighths ocean, and its sole landmass was Port Any. The nearest human colony to Hitchemus was Chi Bootis.

Hitchemus was known for its arts and artists. (PROSE: The Year of Intelligent Tigers)

The Doctor once saw horseshoe crabs deep in an ocean trench on Hitchemus, living in the remnants of a human city. (PROSE: The Southwell Park Mermaid)

Bernice Summerfield visited Hitchemus when she bought a photograph of Aurigan artwork taken on Capella Four. (PROSE: Steal from the World)

Behind the scenes

 * Kate Orman's The Caterpillar Room, published in the Obverse Books charity anthology A Second Target for Tommy, features the Doctor, Fitz Kreiner, and Anji Kapoor returning to Hitchemus a century after the events of The Year of Intelligent Tigers. By this point, the humans and Hitchemus Tigers are in a truce while the rising oceans of the planet continue to threaten what little land remains.
 * In Blair Bidmead's short story Grumpy Auld Men, published on his blog and featuring licensed use of Theo Possible, Theo had performed a set at a pub on Hitchemus. The Twelfth Doctor saw a flyposter for the set, but the date had passed.