Gatiss confirmed the "Great Catastrophe" was an intentional reference to Frontios, so the reference in "Sleep No More" should probably be linked with any pages concerning that. 208.101.148.77talk to me 15:42, November 15, 2015 (UTC)
- While that information could be placed in the story notes section of Sleep No More, it's out of universe confirmation so it can't be stated on any in-universe pages. However, this page is for the Great Catastrophe of The Exterminators, so the Sleep one will need its own page. Shambala108 ☎ 15:51, November 15, 2015 (UTC)