THIRDS CASTING and glossary


(You’ll find these cast members throughout the whole of the THIRDS series, some being introduced in different books. This list will most likely continue to grow.) Does not contain spoilers.


Sloane Brodie—Defense agent. Team leader. Jaguar Therian.

Dexter J. Daley “Dex”—Defense agent. Former homicide detective for the Human Police Force. Older brother to Cael Maddock. Adopted by Anthony Maddock. Human-Therian Hybrid.

Ash Keeler—Defense agent. Entry tactics and Close Quarter Combat expert. Lion Therian.

Julietta Guerrera “Letty”—Defense agent. Weapons expert. Human.

Calvin Summers—Defense agent. Sniper. Human.

Ethan Hobbs—Defense agent. Demolitions expert and Public Safety Bomb Technician. Has two older brothers: Rafe and Sebastian Hobbs. Tabby Tiger Therian.

Cael Maddock—Recon agent. Tech expert. Dex’s younger brother. Adopted by Anthony Maddock. Cheetah Therian.

Rosa Santiago—Recon agent. Crisis negotiator and medic. Human.


Dr. Hudson Colbourn—Chief medical examiner. Wolf Therian.

Dr. Nina Bishop—Medical examiner. Human.


Lieutenant Sonya Sparks—Lieutenant for Unit Alpha. Cougar Therian.

Sergeant Anthony Maddock “Tony”—Sergeant for Destructive Delta. Dex and Cael’s adoptive father. Human.


Ellis Taylor—Team leader for Beta Ambush. Leopard Therian.

Rafe Hobbs—Team Leader for Alpha Ambush. The oldest Hobbs brother. Tiger Therian.

Sebastian Hobbs—Team Leader for Theta Destructive. Was once on Destructive Delta but was transferred after his relationship with Hudson ended in a breach of protocol and civilian loss. Middle Hobbs brother. Tiger Therian.

Dominic Palladino—Defense agent. Close Quarter Combat expert for Theta Destructive. Human.

Angel Herrera—Defense agent. Pilot and BearCat driver for Theta Destructive. Human.

Osmond Zachary “Zach”—Agent for Alpha Sleuth in Unit Beta. Has six brothers working for the THIRDS. Brown bear Therian.


Louis Huerta “Lou”—Dex’s ex-boyfriend. Human.

Bradley Darcy—Bartender and owner of Bar Dekatria. Jaguar Therian.

Austen Payne—Squadron Specialist Agent (SSA) for Destructive Delta. Cheetah Therian.

Dr. Abraham Shultzon—Head doctor during the First Gen Recruitment Program at the First Gen Research Facility.

Wolf—AKA Fang, Reaper. Former TIN operative turned rogue. Wolf Therian.

John Daley—Dexter J. Daley’s biological father. Anthony Maddock’s best friend and partner at the HPF. Human.

Gina Daley—Dexter J. Daley’s biological mother. Worked for the CDC in NYC. First to volunteer to work with Therians. Human.

Darla Summers—Calvin Summer’s mother. Human.

Thomas Hobbs—Ethan, Sebastian, and Rafe Hobbs’s father. Suffers from Therian Acheron Syndrome. Tiger Therian.

Julia Hobbs—Thomas Hobbs’s wife, and mother to Ethan, Sebastian, and Rafe Hobbs. Human.

Benedict Winters—THIRDS-appointed psychologist.

Admiral Abbott Moros—Chief of Therian Defense. Tiger Therian.

Gabe Pearce—Sloane’s ex-partner on Destructive Delta.  Human.

Isaac Pearce—Gabe’s older brother. Human.

Beck Hogan—Leader of the Ikelos Coalition.

Drew Collins—Beck Hogan’s second in command. Cougar Therian.

Felipe Bautista—Drew Collins’s boyfriend. Wolf Therian.

Milena Stanek—Antiques acquisitions. Rosa’s girlfriend. Leopard Therian.


The Order of Adrasteia – Group of Humans against Therians. Has one primary leader.

The Ikelos Coalition – Vigilante group of Therians fighting the Order. Has a leader and second in command.

Westward Creed – Gang of Human thugs who went around assaulting Therian citizens during the riots of 1985. Were arrested for causing the deaths of several Therians but released due to “insufficient” evidence. Eight members all together but only five became members of the Order: Angel Reyes, Alberto Cristo, Craig Martin, Toby Leith, Richard Esteban, Larry Berg, Ox Perry, Brick Jackson.


Melanoe Virus—A virus released during the Vietnam War through the use of biological warfare, infecting millions worldwide and killing hundreds of thousands.

Eppione.8—A vaccine created using strains from animals immune to the virus. It awakened a dormant mutation within the virus, resulting in the altering of Human DNA, and giving birth to Therians.

Therians—Shifters brought about through the mutation of Human DNA as a result of the Eppione.8 vaccine.

Postshift Trauma Care (PSTC)—The effects of Therian Postshift Trauma are similar to the aftereffects of an epileptic seizure, only on a smaller scale, including muscle soreness, bruising, brief disorientation, and hunger. Eating after a shift is extremely important, as not eating could lead to the Therian collapsing and a host of other health issues. PSTC is the care given to Therians after they shift back to Human form.

THIRDS (Therian-Human Intelligence Recon Defense Squadron)An elite, military-funded agency comprised of an equal number of Human and Therian agents and intended to uphold the law for all citizens without prejudice.

Themis—A powerful, multimillion-dollar government interface used by the THIRDS. It’s linked to numerous intelligence agencies across the globe and runs a series of highly advanced algorithms to scan surveillance submitted by agents.

First Gen—First Generation Therians born with a perfected version of the mutation.

Pre–First Gens—Any Therian before First Gen Therians. Known to have unstable versions of the mutation, resulting in a number of health issues.

BearCat—THIRDS tactical vehicle.

Human Police Force (HPF)—A branch of law enforcement consisting of Humans officials dealing only with crimes committed by Humans.

Sparta—Nickname for THIRDS agent training facility at the Manhattan THIRDS headquarters.

TIN—Therian Intelligence Network. Therian equivalent to the Human CIA.

TINMAN—TIN operative. Nicknamed after the Tin Man in The Wizard of Oz as TIN operatives are rumored to have no heart.

Anti-Therianism—Prejudice, discrimination, or antagonism directed against Therians.

Therian Classification—Tattoo marking on a Therian’s neck displaying the Therian’s classification, including family, genus, and species