Transcript: Well, that's the end of the Alpha Series. The Pair Bond simply worked too well. That madwoman Tenenbaum bit the company hand, turning some of the bonded Sisters human again. Others were... lost to Splicers. Either way, the trauma proved too much for the bonded Protectors, resulting in unreasoning rage, or coma. We can harness their suicidal aggression as foot soldiers... but no more, I'm afraid. Today I saw one kneeling near a Gatherer's Garden and... crying.
Location: On a control panel in the Subject Observation booth overlooking the pacification chamber area.