Helen starts to sabotage Martha Anderson. Sierra's observer arrives. Matilda meets likeminded people. Z discovers that she will be forced to make a terrible choice. 

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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/