Sierra uncovers a conspiracy related to Beacons and the Explorers. Z reaches out to Sierra. Helen has a conversation with Clouds.  You can support Mirrors by subscribing and leaving a review at your favorite podcatcher or by going to https://www.patreon.com/mirrorspodcast  Music is "The Cavern" by Sara Afonso, available at the Free Music Archive.  Our cover image is courtesy of the Wellcome Library and has been made available under Creative Commons License 4.0.  All sound effects can be found at https://www.freesfx.co.uk/