Godengine

"Stranded on Mars, the Doctor and Roz team up with a group of colonists on a journey to find much-needed supplies at the North Pole. But when their expedition is joined by a party of Ice Warrior pilgrims, tensions are stretched to breaking point. Meanwhile, Chris finds himself on Pluto's moon, trapped with a group of desperate scientists in a deadly race against time." -- Page 4 of cover.