‘You have to be a certain type of person’: Adam Elliot on the eight-year endeavour to bring ‘Memoir of a Snail’ out of its shell

Well before her turn as Shiv Roy in Succession, Sarah Snook portrayed a drug-affected pre-apocalyptic party-goer in Zak Hilditch’s 2013 sci-fi thriller These Final Hours.

In a small but impactful role, she encounters the young girl at the centre of the story in a swimming pool during party-to-end-all-parties and encourages her to take a pill, before becoming convinced she is her daughter and meeting an untimely end in the subsequen...