The Devil's Due

The Devil's Due is a quest in Fallout 4.

Quick walkthrough

 * 1) Investigate the Salem Museum of Witchcraft
 * 2) Listen to Private Hart's holotape
 * 3) Explore the museum
 * 4) Listen to Sergeant Lee's holotape
 * 5) Complete delivery of the egg OR
 * 6) Return the egg to its nest

Detailed walkthrough
Outside to the right of the witch museum is a body, on it is Private Hart's holotape. When you listen to the holotape it will be clear that they were running from something and ran into the museum. While in the museum there is growling and some body parts dropping from upper levels. Make your way to the second level. In the furthest room there is a savage deathclaw. Upon killing it, you can loot the body in the bathroom to find Sergeant Lee's holotape, and around the body a few broken deathclaw egg and one Pristine deathclaw egg. You have the option to either continue the delivery of the egg in Diamond City, where you will be given 200 caps, and an extra 100 with every persuade approval, or you can return the egg to the nest west of Parsons Creamery where a friendly deathclaw will appear and you can find a deathclaw gauntlet next to the nest.

Companion reactions
Companions will react based on the decision in the quest. If one returns the egg to the nest:
 * Piper and Nick Valentine like this act.
 * Curie, Cait, Preston, Deacon, and Strong dislike this act.
 * Danse hates this act.

Companions will react based on the decision to steal the egg after returning:
 * Hancock, Curie, Deacon, Cait and MacCready like this act.
 * Nick Valentine, Piper Wright dislike this act.
 * Danse hates this act.

Gallery
Fo4devilsduedeathclawfriend.jpg|The friendly deathclaw in its nest 