Find Collar 12: Christine

 is a quest in the Fallout: New Vegas add-on Dead Money.

Quick walkthrough
1.Find the Medical District.

2.Enter the Villa Clinic.

3.Enter the Clinic Basement (lockpick 75) or by using the key located in a desk on the second floor.

4.Turn off the Shielded Speakers by using the terminal in the Clinic Basement.

5.Find Christine in the malfunctioning chamber. Recruit her.

Detailed walkthrough
WARNING: There is currently a bug that doesn't allow you to complete Dead Money or level up, Bethesda and Microsoft are releasing and update to correct the issue.