Raid on the Hospital

After gaining the Anomaly annihilator in Disappeared courier, you can now remove the teleport blocking the route to Hospital, and confront Black Doctor, who should be in the Hospital, according to what Rabinovich told you in Finding Rabinovich.
This quest is unmarked and doesn't have any canonical name.
== Walkthrough ==
=== Removing the teleport ===
Approach the [ teleport] behind the construction site in Limansk as close as possible, and drop the Anomaly annihilator into it from your inventory.
=== Hospital ===
Enter the Hospital. Turns out Cat is already there, ahead of you, together with three stalkers. Talk to him.
Clear out the hospital, which will have 10 Monolith troopers in the first area. Reach the second area by interacting with oddly-textured double doors on the 2nd floor, and clear out the two swamp bloodsuckers and three remaining Monolith agents.
Proceed to the remote end of the hospital and talk to the Black Doctor.
=== Black Doctor talk ===
Black Doctor appears as a hologram of the real self, a scientist who work for C-Consciousness. He reveals that their plan is to expand the Zone - that's what they sent Monolith to install psi-signal repeaters in the remote places such as Swamps. He also tells you that Cat is actually a currently serving FSB agent rather than a retired one as he claimed; Cat was sent to foil the plan of expanding the zone.
He also tells you about some girl who stole a unique artifact from C-Consciousness, setting the plan back even more. Black Doctor's people are trying to find her, but so far unsuccessfully.
After that, Marked One loses consciousness and has a vision. Upon waking up, Black Doctor's hologram disappears. Return to Cat and speak to him. This completes the storyline, with Black Doctor himself remaining elusive.
== Notes ==
* Getting rid of the teleport in front of the Hospital transition also removes the teleport right behind the unfinished building.
* After this sequence is completed, Cat will choose a random Loner camp across the entire game and remain there indefinitely. This includes but is not limited to the mineshaft in Red Forest and the loner village in Cordon.
== Bugs ==