Table of Contents

Lockjaw

Part 1: The Dossier: An At-a-Glance Summary

Part 2: Origin and Evolution

Publication History and Creation

Lockjaw first bounded into the Marvel Universe in Fantastic Four #45, published in December 1965. This landmark issue, titled “Among Us Hide… The Inhumans!”, was a product of the legendary creative duo of writer Stan Lee and artist Jack Kirby. His creation was part of Lee and Kirby's explosive expansion of the Marvel cosmos during the Silver Age of comics. They were moving beyond street-level heroes and into grand, mythological science fiction. The Inhumans were a secret race of super-powered beings, hidden away from humanity, and Lockjaw served as their perfect, bizarre, and awe-inspiring introduction. Kirby's design for Lockjaw is iconic and utterly unique: a gargantuan bulldog, so massive he dwarfs a grown man, with a distinctive tuning fork-like antenna protruding from his forehead. This antenna was a classic Kirby visual motif, signaling a character's connection to cosmic energies or psionic powers. Lee's writing imbued him with a personality that was simultaneously that of a loyal family pet and a mysterious, immensely powerful entity. This combination of the mundane (a dog) and the cosmic (a universe-hopping teleporter) made Lockjaw an instant fan favorite, embodying the imaginative spirit of 1960s Marvel.

In-Universe Origin Story

The true nature of Lockjaw's origin has been one of the most debated and retconned mysteries in Marvel Comics history, creating a rich tapestry of conflicting accounts that only adds to his mystique.

Earth-616 (Prime Comic Universe)

Lockjaw's origin is deliberately shrouded in ambiguity, centered on a single, fundamental question: Is he a dog who gained powers, or was he once a person? Initially, Lockjaw was presented simply as the Royal Family's pet, an Inhuman animal (similar to how dogs or horses exist for humans) who had been exposed to the transformative Terrigen Mists and granted his signature teleportation abilities. For years, this was the accepted status quo. He behaved like a very intelligent and powerful dog, and no one questioned it. The major twist came in The Thing #3 (1983). In a moment of frustration, Quicksilver, who was married to the Inhuman princess Crystal at the time, claimed to have discovered the “truth.” He alleged that Lockjaw was, in fact, an Inhuman who, like many others, had been mutated by the Terrigen Mists into a grotesque, non-humanoid form. He feared a similar fate for his own daughter, Luna. This “revelation” sent shockwaves through the fan community and was treated as canon for over a decade. It reframed Lockjaw not as a pet, but as a tragic figure, a sentient being trapped in a canine form. However, this dramatic origin was eventually retconned. In X-Factor #71 (1991), it was revealed that Quicksilver's claim was based on a lie. The Inhumans Gorgon and Karnak later confessed to having played a cruel prank on their perpetually arrogant brother-in-law, knowing he would believe it. Subsequent stories, such as the limited series Lockjaw and the Pet Avengers and All-New Inhumans, have strongly reinforced the idea that Lockjaw is indeed a canine of Inhuman origin—an animal who underwent Terrigenesis—not a transformed humanoid. The 2017 Lockjaw miniseries further supported this by introducing his biological siblings, confirming he was part of a litter. Despite this, the “was he a man?” question remains a popular piece of trivia and a testament to the character's enduring mystery.

Marvel Cinematic Universe (MCU)

Lockjaw made his live-action debut in the 2017 ABC television series Marvel's Inhumans. In this continuity, his origin is significantly simplified and presented without the comic's long-standing ambiguity. Within the MCU, Lockjaw is definitively an animal. He is the loyal companion of Crystal and the official teleporter for the Royal Family of Attilan. His origin is not explored in depth, but it is implied that he is a unique Inhuman creature, born as he is, whose teleportation ability is natural to his species or was granted via a controlled Terrigenesis process intended for animals. There is absolutely no suggestion that he was ever a humanoid Inhuman. His role in the series is pivotal. After Maximus stages a coup on Attilan, Lockjaw is tasked by Black Bolt with teleporting the Royal Family to safety on Earth. In the process, he is stunned by Maximus's subordinate, Auran, and teleports himself to Hawaii, accidentally scattering the rest of the family across the island of Oahu. He is then struck by a civilian vehicle and taken in by a compassionate Earthling named Dave. His recovery and reunion with Crystal form a significant subplot of the series, as his inability to teleport leaves the Royal Family stranded and vulnerable. The adaptation in the MCU serves a clear narrative purpose: to streamline a potentially convoluted backstory for a television audience unfamiliar with decades of comic book retcons. By presenting him as a super-powered but fundamentally animal companion, the showrunners made him an immediately understandable and sympathetic character without the baggage of his sapience debate.

Part 3: Abilities, Equipment & Personality

Earth-616 (Prime Comic Universe)

Lockjaw's abilities make him one of the most potent non-combatants in the Marvel Universe, with a power set that is both simple in concept and nearly limitless in application.

Lockjaw's true level of intelligence is the character's central enigma. He is fiercely loyal, brave, and generally good-natured. While he most often exhibits the behavior of a very smart and affectionate dog—enjoying head scratches, playing fetch, and responding to commands—there is overwhelming evidence of something more.

Marvel Cinematic Universe (MCU)

The MCU's Lockjaw is a more grounded, though still fantastical, interpretation. His abilities are visually spectacular, but his personality is clearly defined.

In Inhumans, Lockjaw's personality is that of a highly intelligent and exceptionally well-trained animal, but an animal nonetheless. He is deeply bonded with Crystal, responding to her commands and affection. He displays clear emotions like fear, pain, joy, and loyalty. There is no hint of the sapience debate from the comics. He is a super-powered pet, and his relationship with the Royal Family is one of master and beloved animal companion. This change removes the mystery but reinforces his role as a source of emotional connection and sympathy for the audience.

Part 4: Key Relationships & Network

Core Allies

Arch-Enemies

Lockjaw does not possess personal arch-enemies in the way a traditional superhero does. His enemies are the foes of his family and allies.

Affiliations

Part 5: Iconic Events & Storylines

First Appearance & The Coming of the Inhumans

In Fantastic Four #45-47, Lockjaw serves as the world's introduction to the Inhumans. When Medusa flees Attilan, Lockjaw and the Royal Family pursue her into the outside world, leading to a direct confrontation with the Fantastic Four. Lockjaw's sudden, silent appearances and his immense power were a source of profound mystery. He single-handedly defeated the Thing and the Human Torch before the two groups eventually allied. This storyline established him as a being of immense power and the loyal gatekeeper of the Inhuman race.

War of Kings & Realm of Kings

This 2009 cosmic crossover event saw the Inhumans, having taken control of the Kree Empire, go to war with the Shi'ar Empire, led by Emperor Vulcan. In a conflict spanning galaxies, Lockjaw's role was elevated from transport to a critical military asset. He acted as a one-being rapid deployment system, teleporting entire squads of Inhuman soldiers for surprise attacks, extracting key personnel from collapsing warships, and maintaining a communication line across the vast battlefield. His power was a deciding factor in several key engagements, demonstrating his strategic importance on a cosmic scale.

Infinity

When the Avengers left Earth to fight the Builders, Thanos saw his opportunity to attack. His primary target was Attilan, where he believed his secret Inhuman son, Thane, was hiding. As Thanos's forces descended, Lockjaw became the key to the Inhumans' survival. He executed a mass evacuation, teleporting the population of Attilan to safety moments before Black Bolt unleashed his voice and leveled their city. Throughout the event, Lockjaw continued to serve the Inhumans in their resistance against the Black Order, once again proving his bravery under the most extreme pressure.

Lockjaw and the Pet Avengers

This series of miniseries gave Lockjaw his first true starring role. After learning of the existence of the Infinity Gems, Lockjaw is tasked by the Medusa of a pocket dimension to assemble a team to find them. He travels the world, recruiting other animal heroes. The series is lighthearted but treats its characters with respect. Lockjaw is portrayed as a wise and capable leader, communicating with the other animals and formulating the plans that lead them to success against foes like Fing Fang Foom and even Thanos. It's a definitive storyline for anyone interested in the “sapient Lockjaw” theory.

Part 6: Variants and Alternative Versions

See Also

Notes and Trivia

1) 2) 3) 4) 5) 6) 7)

1)
First Appearance: Fantastic Four #45 (Dec. 1965), created by writer Stan Lee and artist Jack Kirby.
2)
The long-running debate over Lockjaw's origin—whether he was a man transformed or an animal given powers—was famously “settled” by writer Peter David in X-Factor as a prank played on Quicksilver. However, the ambiguity is so beloved by fans that writers occasionally hint that there may be more to the story.
3)
In the 2017 four-issue miniseries Lockjaw, it is revealed that Lockjaw has a long-lost litter of siblings, one of whom becomes a temporary sidekick for D-Man. This strongly supports the “born a dog” theory.
4)
The sound effect “BAMPF” is famously associated with the X-Man Nightcrawler's teleportation. Lockjaw's teleportation is usually silent in the comics, but often accompanied by a visual flash or a subtle “wump” sound in adaptations.
5)
In the MCU's Inhumans television series, the CGI model for Lockjaw was created based on the concept of him weighing approximately 2,100 pounds.
6)
Over the years, Lockjaw has been a member of multiple teams, including the Inhuman Royal Family, the Pet Avengers, and has even been deputized into the Nova Corps on one occasion.
7)
Lockjaw's forehead antenna is a classic Jack Kirby design element, often used to signify cosmic power or psionic ability, similar to the headgear worn by characters like the Silver Surfer's master, Galactus.