http://www.ign.com/wikis/detroit-become-human/Spare_Parts
[Stormy Night]
When the cutscene at the start of the chapter finishes, move Kara into the kitchen and serve the food to everyone at the dinner table. When everyone is seated, turn on the light and serve both Todd and Alice a drink.
You’ll then have to wait for the conversation between them to progress before you can do anything else. You can look at this sequence with a cinematic view by pressing L1.
Eventually, Todd gets frustrated and will slap Alice. She will head upstairs and Todd will tell you to stay where you are, then head out to the kitchen and living room. At this point, Kara will then begin to fight her programming.
Hit the button prompts as they appear to help Kara become a deviant. After a short scene and when you can control Kara again, you can either go upstairs to protect Alice or try to reason with Todd.
PROTECTING ALICE
Immediately move upstairs towards Alice’s room. You’ll find her hiding and scared. You will have to hide with her in another room before Todd comes upstairs and hurts Alice.
Hold the button down and hide in Todd’s room and wait for him to pass by down the hall. When you see him go away, let go of the button and you’ll immediately start running with Alice downstairs.
You have to make a quick choice to run to the garden behind the house, or out the front door to the street. Choose the front door and begin hitting all of the button prompts that appear.
You need to do this quickly with each button or mash each input before Todd comes racing down and hurts Kara and Alice. Successfully doing so will allow Kara and Alice to escape out the front door and down the street.
Run towards the bus stop when you get outside. If you don’t and linger too long, Todd will catch up with you and break Kara. But if you manage to get to the bus stop, the two of them will escape. A cutscene will play once you make it to the bus and end the chapter.
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