|“||You still got the map with the telluric currents on it? Bring it to the operating theater in two hours.||”|
The Dread Doctors Operating Theater served as a base for the Dread Doctors and later Theo Raeken. Located in Beacon Hills' vast underground tunnels, it was here where most of the Dread Doctors' experiments would occur, turning young, unsuspecting teenagers into monstrous chimeras in an effort to resurrect The Beast of Gevaudan.
The lair was well hidden and difficult to find, as proven by the failed efforts of Scott McCall, Malia Tate and Mason Hewitt in Ouroboros. By the time Liam and Scott managed to locate the lair, the Dread Doctors had already abandoned it, Theo then taking it over as a hide-out for him and his pack.
Before the Dread Doctors relocated, a man was often seen inside a large transparent tube containing green liquid. Theo explains that the Doctors called him "Der Soldat" which means The Soldier in German. He was a Nazi Alpha Werewolf the Doctors were using to prolong their lives, as they had been doing for decades.
- The Surgeon kills Belasko with his steel cane by piercing his chest. Ravens then come flying out his chest. ("Creatures of the Night")
- Tracy Stewart is injected with mercury, thus completing her transition into a chimera as her eyes eventually changed from being those of a werewolf to those of a kanima. ("Parasomnia")
- Liam Dunbar and Hayden Romero are taken to the lair. Liam is pumped up with wolfsbanes in order to keep him weak while the doctors experiment on Hayden. ("Ouroboros")
- The Dread Doctors examine Zach's dead body. ("Lies of Omission")
- Theo injects his claws into the neck of Lydia Martin in order to discover the location of the Nemeton, so that he can resurrect several of the dead chimeras, making him the alpha of his own pack. ("Status Asthmaticus")
- The Surgeon hammers the wall with his cane, revealing a painting of two creatures, one being a Hellhound, the other being The Beast of Gevaudan. ("Status Asthmaticus")
- Theo sends Josh, Tracy and Corey after Deucalion, they succeed in bringing him back and hooking him up to a machine that constantly pumps wolfsbane into him, keeping him weak. ("The Sword and the Spirit")
- While being guarded by Hayden, Deucalion reveals that Theo can't just put on Belasko's Talons and use them as his own, so that he can steal the power of La Bete. He explains that the talons were created with a specific frequency and they'll kill Theo if he wears them. ("Amplification")
- Deucalion reveals that he is a willing prisoner. He teaches Theo how to steal power. After understanding the full process, Theo kills Josh Diaz, thus taking his power. ("The Beast of Beacon Hills")
- Tracy helps Theo back to the lair after his fight with the Dread Doctors and The Beast of Gevaudan. He gets Tracy to lower her guard, then killing her to steal her powers. ("Apotheosis")
- Hayden takes Sebastien Valet to the lair, hoping that he would find what he needs. She attempts to stab him with a syringe filled with kanima venom, she fails and Sebastiens claws her. ("Apotheosis")
- Der Soldat escapes the tube that he was being held in by the Dread Doctors. ("Apotheosis")
- This particular lair originally belonged to The Dread Doctors but Theo Raeken took over once they moved on to a new location.
- Theo killed two members of his pack in this lair.
- Theo brought Malia to the lair using Wolfbane to knock her out first but underestimated her abilities as she later told Liam how to find it