Sandra mentions the name Shipman during an argument over criminals not getting caught for decades. James Bolam, who plays Jack in this show, played Dr Shipman in Harold Shipman: Doctor Death (2002).
Just after 38:30, Brian Lane is searching in his shed for a copy of the book Home of the Blizzard, by Sir Douglas Mawson. Sir Mawson. Mawson was an early 20th century arctic and antarctic explorer, and the book is a true account of a 1915 expedition in Antarctica.