Theo's Pack

One of the antagonists of season 5, this pack made up of Chimera. Led by Theo, this pack contains Hayden, Tracy, Corey and Josh. All members of the pack were made into Chimera after they were experimented upon by the Dread Doctors.

This pack was created by Theo after the Dread Doctors deemed the other Chimera as failed experiments. If a Chimera bled mercury-like fluid they were considered as failed experiments and were subsequently killed. After this, the bodies were collected by Parrish and were taken to the Nemeton.The pack was created at the end of season 5A when Theo injected some of the dead Chimera around the Nemeton. Once injected, the Chimera would be revived.

During the premiere of season 5B, Theo and his pack are seen breaking into Eichen House, looking for Lydia. Later in the episode, Theo tries to add Noah to his pack. While Theo and Hayden hunt for him, Theo tells her that her werejaguar DNA is "attracted" to him and that this will lead them to him. However, the Dread Doctors find a bleeding Noah first.