Theo's Chimera Pack

This pack is made up of Chimera, all of whom were created by the Dread Doctors. Led by Theo, this pack is seen to be one of the antagonists of season 5B.

Theo created the pack after each Chimera was deemed a failed experiment. Once one of the Chimera bled a mercury-like substance, the Dread Doctors killed them and moved on to a new potential Chimera. After this, Parrish would collect the bodies and take them to the Nemeton.

The pack was created during the mid-season of season 5. Theo arrives at the Nemeton and injects four of the dead Chimera; Hayden, Tracy, Corey and Josh. It is currently unknown what substance was used to revive the dead Chimera. Season 5B opened with a flash forward of Theo and his pack, minus Hayden, breaking into Eichen House, hunting for Lydia. Later in the episode we see Theo and Hayden hunting for Noah, another failing Chimera experiment and potential pack member. Theo says that Hayden is "attracted" to Noah through her Werejaguar genes being drawn to Noah's Beserker genes. However, they do not find a bleeding Noah before the Dread Doctors do.