Doctor Hess serves as the Headmistress for the Kendricks Academy in England, a school used to train future British Men of Letters operatives. She is also one of the British Men of Letters Elders, the group that serves as the leaders of the organization.
In 1987, Hess called Mick and Timothy into her office and forced one of them to kill the other to ensure that they would follow the code absolutely. She handed them a knife, and to Timothy's horror, Mick stabbed him with it.
In 2017, while acting as a British Men of Letters Elder, Hess informs Mick that they don't have time to convince the American hunters to join them. She orders Mick to "assimilate or eliminate" and arranges her lackey, Renny Rawlings, to keep an eye on Mick.
Mick returns to the headquarters later on to find Doctor Hess with Arthur. Unlike before, Mick openly defies the British Men of Letters' code of conduct and chooses the Winchester way of doing things. His change in alliance convinces Hess that Mick has gone rogue, so she orders Arthur to shoot Mick point-blank.
While standing over Mick's corpse, Hess announces that the Winchesters must be eliminated and their efforts in America are a failure.
Later on, Doctor Hess orders Arthur Ketch to infiltrate the Men of Letters bunker so that they may know all they can about Sam and Dean. Doctor Hess then meets with Crowley who asks if their terms are still meant, she confirms it but tells him that she won't spare the Winchesters.
In Who We Are, Doctor Hess coordinates an assault against the American hunters. However, before they can act, a group of hunters including Sam Winchester, Jody Mills, Roy, Walt and Jerry Hollister attack the British Men of Letters compound, taking several losses but killing all of the British operatives. After killing Jerry, Doctor Hess retreats to the control room where she desperately calls for extraction, but is unable to receive it.
At that moment, the hunters break in and Doctor Hess tries to convince Sam (who she initially mistook for Dean) not to kill her, revealing the escape of Lucifer to him by showing Sam a file containing surveillance photos of Lucifer outside of Crowley's old lair. Doctor Hess insists that the American hunters still need the British Men of Letters, but Sam refuses and shoots the computer Doctor Hess was communicating to Britain through. Calling Sam a bastard, Doctor Hess grabs her gun but is shot through the head by Jody before she can do anything.
In All Along the Watchtower, Sam shares the file Doctor Hess gave him with Mary and Dean. After Sam speculates that Crowley had something to do with the restoration of Lucifer's old vessel, Dean admits that Doctor Hess told them that Crowley is dead but he doesn't believe that Crowley is actually gone.
Skills and AbilitiesEdit
Doctor Hess possessed great combative skill and prominent physical prowess despite her age. She was strong enough to snap Jerry's neck with her bare hands and throw him over a railing with seemingly inhuman ease after having disarmed him of his gun with a swift kick. Additionally, she was able to easily stun Jody with an elbow to the face.
After the American hunters attacked the British Men of Letters compound, a team led by Sam Winchester confronted Doctor Hess in the control room. After Sam refused Doctor Hess' plea to work together against Lucifer, Doctor Hess grabbed her gun and prepared to shoot Sam. Before she could, Doctor Hess was shot through the head by Jody Mills, killing her.
- Season 12
- Actress Gillian Barber previously portrayed Mrs. Rourke from the Season 1 episode Faith.
- Doctor Hess' name maybe a reference to Ruldolf Hess, Hitler's deputy.
- Her strict and deadly tactics in training children have led some fans to compare her to Dolores Umbridge, a Headmistress from the Harry Potter series. Indeed, even the Kendricks Academy which she is the Headmistress of loosely resembles Hogwarts, a school also from said series which is noted by the Winchesters when Mick Davies tells them about it.
- She is the first Big Bad to be killed unreformed since Abaddon in Season 9.
- She is also one of the few Big Bads to be killed by a non-Winchester.
- While telling Sam about Lucifer, Doctor Hess repeatedly referred to Lucifer as "it". This may be the result of her disregard for angels in general.
- David Haydn-Jones believes Doctor Hess is one of the few people Arthur Ketch is afraid of.