Dr. Kent V. Nelson is a superhero in American comic books published by DC Comics. Created by writer Steve Gerber and artist Justiniano, he first appeared in Countdown to Mystery #1 (November 2007) as the seventh character to use the Doctor Fate codename. The character was created in order to simplify the Doctor Fate character, featuring several departures from the past versions of the character. 
The successor to Hector Hall, Kent is the grandnephew of the original Kent Nelson, his namesake, and a former psychiatrist whose life unravels following an extramarital affair and malpractice but improves when he is chosen as the new incarnation of Doctor Fate. Lacking any connections to the Lords of Chaos and Order, he is instead a sorcerous superhero of the Justice Society of America. This version of Doctor Fate was erased following the New 52 for a time, replaced by Khalid Nassour although later, his history is restored and retroactively consider Nassour's predecessor to the role of Doctor Fate.
Publication history.
In early 2007, DC published a bi-weekly run of one-shots depicting the search for a new Doctor Fate. These were intended to be followed by a new Doctor Fate ongoing series in April 2007, written by Steve Gerber and illustrated by Paul Gulacy, featuring the new Doctor Fate. However, the series was delayed due to extended production and creative difficulties. Gerber said in an interview for Newsarama that the story intended for the first arc of the Doctor Fate ongoing series had been reworked to serve as the main story for Countdown to Mystery, a dual-feature eight-issue miniseries with Eclipso as the second feature. The first issue of Countdown to Mystery, with art by Justiniano and Walden Wong rather than Gulacy, was released in November 2007. Due to Gerber's death, the seventh issue was written by Adam Beechen using Gerber's notes. The final issue was written by Beechen, Gail Simone, Mark Waid, and Mark Evanier, who each wrote a different ending to the story. The character then appeared in the Reign in Hell miniseries and in Justice Society of America (vol. 3) #30 (August 2009), featuring in the book until its cancellation with #54 in August 2011.
During the New 52 reboot, the character's history and existence underwent retcons alongside other incarnations, with the exception of the Kent Nelson incarnation. This resulted in Kent Nelson being established as the original Doctor Fate and Khalid Nassour as the second in the new continuity. This setup remained in place until 2023, when Geoff Johns restored the character's history within the mainstream continuity. The restoration positioned the character as the Doctor Fate who preceded Khalid Nassour while the original Kent Nelson also reclaimed the helm to train the character as an official successor. In the newer continuity, the character's true relation to Kent Nelson and ultimate fate is considered unknown.
Fictional character biography.
Origin.
In his debut, Kent V. Nelson first revealed as a respected psychiatrist who undergoes a series of personal and professional setbacks that costed him dearly; an extramarital affairs with a younger college student leads to a divorce, depression, and estrangement from both his wife and daughter, Marissa and Laryn respectively. His depression later results in a malpractice suit when Nelson failed to properly treat a client, who displayed concerning behaviors even during their sessions and later killed several people in a vehicular homicide. This leads to the loss of his home, possessions, and professional license, leaving him homeless and desperate. However, Kent's life takes a turn when he discovers the Helmet of Fate and assumes the mantle of Doctor Fate. 
Becoming Doctor Fate, Kent encounters Negal, a foe of the first Doctor Fate intent on keeping the mantle vacant but is defeated, and works to re-establish a healthier semblance of life with the magical powers of the helmet. With the help of occult enthusiast Maddy, he learns of the Doctor Fate mantle. He is helped personally by Inza Fox, a comic book artist whom coincidentally shares the name of his aunt and is later abducted by Negal. After a horrific experience, he tries to relinquish the helm to Maddy but she is also abducted by Negal's servant and is forced to come to terms with being the new Doctor Fate. 
In the final issue, the series presented several endings based on Steve Gerber's notes:
"Reign in Hell" and other appearances.
The "Reign in Hell" storyline and comic title features Kent V. alongside other notable magic users (Zatanna, Ibis the Invincible, Enchantress, etc.) getting involved in a civil war in hell as Zaurel calls for an alliance and intervention due to the potential cosmic ramifications it poses. The conflicting sides includes Neron, the current ruler, and twin demon lords Satanus and Blaze, the demonic children of the Wizard Shazam. An inexperienced sorcerer, Nelson is unaware of how to escape from hell and battles Blaze, who lambasts him for his limited skills but is defeated when she mistakenly how to focus his power. With the assistance of Doctor Occult and Nightshade, Kent and the group ultimately manage to escape Hell, despite interruptions from Lobo and the sacrifice of Sargon the Sorcerer. As the group successfully exits Hell, Lady Blaze ultimately prevails and assumes the position of the new Ruler of Hell, becoming the new Devil.
Later, Kent would help the Justice Society when they were targeted by various villains trained specifically to fight their members, using the reputation of Doctor Fate's power in order to grant them an advantage. He also works to save Mister Miracle's life when he receives fatal injuries. Later, his body is possessed by Mordru briefly in another attack on the JSA despite their preparations for it. With Kent's help, the team once more beats Mordru and the sorcerer sets out to study more about his abilities. Kent would also return to help the Society fight against the resurrected Starheart although he is brought under possession and control from the Starheart's will manifesting through Alan Scott for a time. He also helps the team fight against the new threat known as Scythe.
Dawn of DC.
In the aftermath of the "New Golden Age" storyline, Kent V.'s tenure as Doctor Fate was reintroduced into the mainstream continuity, establishing him as the Doctor Fate who preceded Khalid Nassour. While Khalid acknowledged Kent's time as Doctor Fate, he expressed uncertainty about their familial relationship to Kent (which also retroactively possibly makes the two characters cousins or otherwise related to one another) or the ultimate fate of the younger Kent. A past version of the younger Kent also suffered the consequences of the time-traveling Degaton, who was empowered by a Lord of Chaos and sought to replace the Justice Society of America with his own, leading to the death of Doctor Fate in various timelines.
Characterization.
The grand-nephew of the original Kent Nelson, the younger Kent a former psychiatrist whose engagement in an extramarital affair and malpractice stemming from depression and a lawsuit costed him a comfortable livelihood and estrangement from his ex-wife and daughter. Within his debut storyline, however, he both retained a strong moral sense, a inclination towards science due to his studies, and using his medical expertise; one possible ending of his debut storyline also showcase the character willing to use his mystic abilities and psychiatric abilities to help others, even demonic entities. 
Unlike past Doctor Fates, Gerber intended for the character to dethatched from any associated mythologies, the Lords of Chaos and Order, typical resources such as the Tower of Fate, and learns sorcery in a more conventional manner. Like Doctor Strange from Marvel Comics, Kent's magical abilities stem from a consistent array of spells and charms and the helm, although suggestive in using certain spells, do not confer instant mastery of magic. 
Reputation.
As Doctor Fate, Kent is considered a premier mystic superhero with substantial magical power from the Helmet of Fate in his possession. While regarded as a novice in earlier appearances with little skill, he is later recognized as among the most formidable practitioners in the DC Universe, carrying the title of Sorcerer Supreme. One source also states him to be a protector of chaos and order despite his tenure taking place after the collective destruction the Lords of Chaos and Order.
Powers and abilities.
Lacking any inherent abilities, Nelson is a former psychiatrist and can utilizes his abilities to analyze others. His otherworldly abilities are centered around the usage of enchanted objects to safeguard from inherent risks of magic, classifying him as a "sorcerer". As Doctor Fate, Nelson donned the Helmet of Fate, granting him a vast array of magical powers, able to cast basic spells and incantations and due to the artifact, could access a vast library of spells, allowing him to cast more potent and advanced abilities. Nelson also possessed the Amulet of Anubis, allowing for classical powers such as enhancement of mystic powers and protections against psychic-related powers, and the Cloak of Destiny offered him fireproof protection and resistance against magical attacks.
Weaknesses.
Nelson lacked any connections with the (then) deceased Lords of Order, making him reliant on personal experiences to understand the helm. This limited both his comprehension and the character believed himself not as powerful as the original Doctor Fate. Furthermore, the helmet and its associated artifacts serve as the central source of Kent's power, rendering him powerless if he is deprived of them.