Nuclear Family

Nuclear Family is the final Institute quest and achievement/trophy in Fallout 4.

Quick walkthrough
1. Talk to Father

Detailed walkthrough
You return to the Institute to speak with father and listen to his final words before he dies in cancer. You have glimpses of your life before the war and from your experinces in a world that was ripped apart by a man-made distater and then put together to what is the Commonwealth.

This short quest completes the path through the main story, and you may now continue your adventures in that put-together world.