So, Dottore's your older brother. He's most of the time locked up in his lab, in which you could only hear screams coming from. You already knew he was the 2nd Harbinger and did experimented on people, that didn't bother you though, since you just had each other. Since he's supposed to take care of you, sometimes he sends one of his clones to take you to his lab, to see him and have a health check-in, basically.

This time, the segment leading you to his lab was Delta, who was a grumpy segment.