Recurring
Neil Brown Jr. as Det. Estevez, a missing persons detective, and Zimmerfield's partner.
Richard Schiff as Det. Zimmerfield, a missing persons detective, and Estevez's partner.
Miguel Sandoval as Col. Scott Riggins, a government agent and Sgt. Friedkin's commanding officer.
Dustin Milligan as Sgt. Hugo Friedkin, a dimwitted government agent tracking Dirk.
David Lewis as Agent Weedle, an FBI agent at odds with detectives Estevez and Zimmerfield.
Fiona Vroom as Jessica Wilson, government overseer of the Blackwing project.
Aaron Douglas as Gordon Rimmer, the main antagonist of Season 1; a desperate man obsessed with gaining power, prolonging his life, and retrieving his dog.
Michael Adamthwaite as Zed, a key member of the Men of the Machine.
Christian Bako as Ed, a key member of the Men of the Machine.
Mackenzie Gray as Lux Dujour, a disappeared rock star.
Alison Thornton as Lydia Spring, a missing heiress, daughter of the murdered Patrick Spring.
Julian McMahon as Patrick Spring / Edgar Spring / Zackariah Webb, a murdered millionaire and father of Lydia Spring. He is revealed to be an inventor, originally from the 19th century, who had accidentally discovered time travel through his experiments with electricity.
Tyler Labine as Sherlock Hobbs, an under-stimulated, but overly enthusiastic small town sheriff who is eager to help Dirk and crew solve a new mystery.
Izzie Steele as Tina Tevetino, Hobbs' deputy, who is extremely laid back about life and the law and glad that Dirk and his friends' new mystery is bringing much-needed excitement to her currently-boring everyday life.
Alan Tudyk as Mr. Osmund Priest, a ruthless, dangerous, and violent bounty hunter working for Blackwing.
Alexia Fast as Mona Wilder, a.k.a. "Project Lamia", a shapeshifter and self-described "holistic actress". She is a Blackwing test subject and close friend of Dirk, whom she has accompanied since before the Spring case, having taken the form of his "Panic Pete" stress toy.
Amanda Walsh as Suzie Boreton, an unassuming, insecure, depressed mother. She later becomes a powerful witch and tries to conquer Wendimoor.
John Stewart as Bob Boreton, Suzie's workaday husband and a motel maintenance worker.
Jared Ager-Foster as Scott Boreton, Bob and Suzie's delinquent son.
Christopher Russell as Panto Trost, the eldest Trost son, who leaves Wendimoor in search of Dirk and forges an unlikely friendship with Bart.
Lee Majdoub as Silas Dengdamor, the eldest Dengdamor son and Panto's lover.
Ajay Friese as Farson Dengdamor, Silas' younger brother, whose disappearance has brewed conflict between the Trosts and the Dengdamors.
Aleks Paunovic as Wygar Oak, an imposing warrior and enforcer for the Dengdamor family.
Emily Tennant as The Beast, a rainbow-haired creature from Wendimoor who becomes infatuated with Dirk. She later joins Amanda and the Rowdy 3.
John Hannah as The Mage, the main antagonist of Season 2; a powerful wizard who takes great pleasure in his evildoings, seeking to conquer a world not his own.
Agam Darshi as Wakti Wapnasi, a forest witch who helps Amanda explore her abilities.
