Holly braces for the year's deadliest calendar dates, while Carol quarantines herself from the ghosts of history's most notorious plagues.   Sources: https://www.chron.com/news/nation-world/article/April-14-20-Historically-America-s-most-5410307.php ; https://www.usatoday.com/story/news/nation/2019/04/17/april-15-week-cursed-unlucky-notre-dame-fire-lincoln-titanic-waco-boston-marathon/3495247002/ ; https://www.vice.com/en_us/article/xy9b5w/the-third-week-of-april-is-a-very-scary-time-for-america ; https://geekmom.com/2013/04/does-more-tragedy-happen-in-april/   ; https://en.wikipedia.org/wiki/Assassination_of_Abraham_Lincoln ; https://en.wikipedia.org/wiki/Notre-Dame_de_Paris_fire ; https://en.wikipedia.org/wiki/Virginia_Tech_shooting ; https://en.wikipedia.org/wiki/Texas_City_disaster ; https://www.history.com/news/deadliest-natural-disasters-us-storm-flood-hurricane-fire ; https://en.wikipedia.org/wiki/Waco_siege ; https://en.wikipedia.org/wiki/Oklahoma_City_bombing  ; https://en.wikipedia.org/wiki/Adolf_Hitler ; https://en.wikipedia.org/wiki/The_Holocaust ; https://en.wikipedia.org/wiki/Columbine_High_School_massacre ; https://en.wikipedia.org/wiki/Deepwater_Horizon_oil_spill https://amyscrypt.com/york-england-haunted-places/ https://science.howstuffworks.com/science-vs-myth/strange-creatures/grim-reaper3.htm https://www.travelchannel.com/shows/ghost-adventures/articles/poveglia-islands-haunted http://www.webelieveinaliens.com/ancient-aliens-plagues-and-epidemics/ https://www.ranker.com/list/black-plague-ghost-stories/erin-wisti https://mysteriousuniverse.org/2017/04/death-incarnate-bizarre-tales-of-plague-bearing-phantoms/ https://historycollection.co/thousands-died-from-the-black-death-in-1666-leaving-behind-haunted-plague-pits-in-london/