It's episode 2! Minna and Reese talk about two mysteries that intrigue them the most. 

Sources:

Ask a Mortician: https://www.youtube.com/watch?v=ecrz_2yu0Ag 

BuzzFeed Unsolved: https://www.youtube.com/watch?v=bQpNdevrtiM 

The Prosecutors: https://www.youtube.com/watch?v=6gsqSvSbvtg (go listen to all 5 parts! They're SOO good and in-depth!)

www.dyatlovpass.com

https://investigationsforthemissing.org/ 

Park Predators: https://parkpredators.com/the-student/ 

Generation Why: https://podcasts.podinstall.com/wondery-generation-why-podcast/201902240600-trenny-gibson-missing-318.html