Lorenzo Cabot

 is the father of Jack Cabot and Emogene Cabot. He discovered an alien artifact that granted him inhuman abilities, including unnaturally long life. His family has been taking Mysterious serum derived from his blood in order to live for more than 400 years. In the the events of The Secret of Cabot House, the Sole Survivor can kill Lorenzo in his cell or release him. If Lorenzo is released, he can still be killed. In combat (based on level 40 at time of mission), Lorenzo is at level 50, has 79 defense, 100 energy resistance and 150 rads resistance. He is also capable of releasing short bursts of energy that can deflect grenades and push the player away when close.

If allowed to live, after the quest, you can find him in the world conducting research. I have found him near the church west of the roadside pines motel, I assume he will be elsewhere. (upon reloading to try different dialog choices, I discovered this encounter was random so I assume it can happen elsewhere)

Appearances
appears only in Fallout 4.