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Target 24 of 30 · Thunderbolts*

Sentry

IdentityConfirmed

Real nameRobert "Bob" Reynolds

CodenameSentry

ContinentThunderbolts*

In DoomsdayLewis Pullman (on Marvel's cast list; role not yet named)¹

First seenSentry #1, September 2000²

Created byPaul Jenkins, Jae Lee²

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Level 1 // The briefDecrypted · 30 seconds

WhoBob Reynolds, a troubled former addict whose experimental serum made him the Sentry, a hero of immense power, shadowed by a dark side called the Void.³

AbilitiesFlight, near-invulnerability and immense strength, and the Void's power to swallow people into darkness.³

In DoomsdayMarvel lists Lewis Pullman in the cast but has not named his role; his most recent released role was Bob / Sentry.¹

Last seenThunderbolts* (2025), as Bob / Sentry: Fourteen months on, he avoids his powers for fear the Void will return.⁷

Sources

Level 2 // Surveillance recordOn screen · 1 sightings, 1 in the MCU

Every live-action sighting of Sentry, and everything Marvel has confirmed.

2025
Thunderbolts* MCU
Lewis Pullman (Clayton Cooper as young Bob) Bob, a former addict and the only survivor of O.X.E.'s Project Sentry serum trials, wakes with gaps in his memory inside a vault in Utah, escapes with Yelena Belova's group and finds he can fly and shrug off bullets. Valentina Allegra de Fontaine dresses him up as the Sentry and he easily beats the team, but he turns on her, and after her assistant Mel sets off a kill switch his dark side, the Void, takes over and pulls Manhattan's people into shadow worlds built from their worst memories until Yelena and the others reach him inside and help him take back control. He stays with the group Valentina brands the New Avengers, and in the post-credits scene, set fourteen months later, he says he is keeping away from his powers in case the Void returns as the team spots an incoming ship marked with a '4'.¹²³⁴

What Marvel confirmed

The film. Avengers: Doomsday opens 18 December 2026.⁵

Sources

Level 3 // Deep archiveThe comics · since September 2000

Origin, the comics by era, abilities and recorded feats.

Origin

The Sentry was launched in 2000 through Marvel's Marvel Knights line by writer Paul Jenkins and artist Jae Lee, but he was sold to readers as a lost hero from the early 1960s. The wiki describes the promotional story that went with him: Wizard magazine reported that the widow of an artist named Artie Rosen had sent Marvel a forgotten box holding an old comic starring the Sentry and character sketches from 1961 signed by Stan Lee and Rosen. That story was later revealed to be an elaborate marketing hoax. The comic itself plays the same game. Sentry #1 cuts between pages told like a Silver Age comic, in which a boy called Robby Reynolds drinks a professor's secret formula and becomes a golden-suited hero, and the present, in which Bob Reynolds is an ordinary middle-aged New Yorker who is not sure whether he really was the Sentry or only read about him.

Inside the story, the Sentry was a celebrated hero in the years just before the Fantastic Four appeared. He was an equal to Reed Richards, a mentor figure to a young Spider-Man, an ally of the X-Men and a rare friend to the Hulk, and he had a wife, Lindy Lee, a young sidekick called Scout, a robotic aide called C.L.O.C. and a Watchtower base. How he got his powers has been retold several times. The first version made Robby the professor's teenage assistant, but later stories, which the wiki treats as the real account, say Bob was a young methamphetamine addict who broke into the professor's lab looking for drugs and drank the Golden Sentry Serum without knowing what it was, and the blast that followed killed his partner and two guards. The serum was traced back to Project Sentry, a 1947 effort by the United States and Canada to make the Super-Soldier Serum vastly more powerful.

His downfall came with the Void, a shadowy monster that played on people's fears and killed a huge number of people in Manhattan. When Bob discovered that the Void was the dark side of his own power, he, Reed Richards and Doctor Strange built a system that made everyone on Earth forget the Sentry ever existed, Bob included, and the Void disappeared with him. In the 2000 miniseries his memories return, the Void comes back with them, and he and Reed turn the system back on, erasing him a second time. A 2005 New Avengers story then explained the comics framing from inside the story: the mutant Mastermind had planted a mental virus in Bob on behalf of a villain called the General, and Bob, reaching out for help without knowing it, put his memories into the head of writer Paul Jenkins, who turned them into the comics readers had been holding.¹²³⁴⁵⁶⁷

The record, by era

2000-2001
Remembering the Sentry The forgotten hero
Bob Reynolds, living a quiet life with Lindy, senses the Void returning and starts to remember being the Sentry, while Lindy, upset to learn he lied about having quit, goes to stay with a friend. When he goes looking for the heroes he once knew, Professor X, Reed Richards and the rest have no idea who he is, and only the Hulk remembers him. Once he grasps that the Void is part of himself, he and Reed switch the Watchtower's system back on so the world forgets the Sentry again, and Reed buries the hero's reputation so the erasure will hold.¹²³⁸⁴
Key issues: Sentry #1 (2000) · Sentry #4 (2000) · Sentry/The Void #1 (2001)
2005
Breakout from the Raft New Avengers
Bob resurfaces as a prisoner on the Raft who says he killed his wife, and when Electro breaks the inmates out he hauls Carnage into orbit and tears the symbiote in two. The heroes then find Lindy alive and learn that the only record of the Sentry is a run of comic books, and when the Void attacks again Reed plays a message in which Bob had asked to be stopped by any means necessary. Emma Frost helps him see that Mastermind's tampering, not his own choice, wiped the world's memory, and he gets his memories and powers back and joins the New Avengers, with the Watchtower reappearing on top of Stark Tower.¹⁹¹⁰⁷
Key issues: New Avengers #1 (2005) · New Avengers #7 (2005) · New Avengers #10 (2005)
2005-2006
The truth about the serum Solo series
Back in public life as the 'Golden Guardian', the Sentry saves lives every day while seeing a psychiatrist, Cornelius Worth, and insists the Void is locked in a vault in his Watchtower; Worth finds only a chair and a mirror inside. Bob admits he first took the serum as a teenager to get high, and in Antarctica the Void tells him the formula was a massively boosted Super-Soldier Serum from a secret 1947 program called Project Sentry. Furious, the Sentry hurls the Void into the Sun and tells it he no longer needs it.¹¹¹¹²⁵
Key issues: Sentry Vol 2 #1 (2005) · Sentry Vol 2 #5 (2006) · Sentry Vol 2 #8 (2006)
2007-2008
Registration and World War Hulk Mighty Avengers
After agonising over the Superhuman Registration Act, the Sentry sides with Iron Man and joins the Mighty Avengers, where Tony Stark and Ms. Marvel offer to help with his mental health. When Ultron appears to kill Lindy he almost tears the machine apart in revenge, then finds her alive, but he later overhears her asking Stark to find a way to shut him down or kill him if it comes to that. Persuaded at last to face the returning Hulk, he cuts loose further than he ever had before, and the fight ends only when both of them burn out and revert to Bob Reynolds and Bruce Banner.¹¹³¹⁴¹⁵
Key issues: Mighty Avengers #1 (2007) · Mighty Avengers #6 (2008) · World War Hulk #5 (2008)
2008-2010
Osborn's secret weapon Dark Avengers
During the Skrull invasion a Skrull posing as the Vision takes the Void's shape to unsettle him, and he flees to the rings of Saturn before returning as the Void to protect Lindy. Norman Osborn then recruits him to his Dark Avengers by insisting the Void is not real and handing him a new dose of the serum, which brings the Void fully back. Lindy, now afraid of him, shoots him and records the story of his drug-addicted past, but he comes back to life, and worn down by the Void's taunting, Bob hands it control.¹¹⁶¹⁷⁶
Key issues: Mighty Avengers #14 (2008) · Dark Avengers #1 (2009) · Dark Avengers #13 (2010)
2010
The fall of the Golden Guardian Siege
Bullseye, posing as Hawkeye, murders Lindy on Osborn's orders and tells the Sentry she took her own life. In the attack on Asgard the Sentry kills Ares by tearing him in half, then levels the city on Osborn's order, and as the Void he kills Loki. After Iron Man drops a Helicarrier on him, Bob asks the heroes to kill him; when the Void rises again Thor destroys him with lightning and carries his remains into the Sun, and the heroes later share their memories of him at a funeral for Bob and Lindy.¹¹⁸¹⁹²⁰²¹²²
Key issues: Dark Avengers #15 (2010) · Siege #2 (2010) · Siege #4 (2010) · Sentry: Fallen Sun #1 (2010)
2013-2018
Raised by the Apocalypse Twins Horseman of Death
The Apocalypse Twins bring him back as one of their Horsemen of Death, and his madness grows until he sees himself as Apocalypse's heir. Thor convinces him to help stop the Celestial Exitar, after which he drags its body far from Earth and drifts through space, at one point asking Doctor Strange to end his life. Strange instead seals him safely inside his own mind, which frees him from Apocalypse's hold, and later calls him back to help fight Loki; when Strange lets the Void loose to win that fight, Bob tells him never to contact him again.¹²³²⁴²⁵
Key issues: Uncanny Avengers #9 (2013) · Uncanny Avengers #22 (2014) · Doctor Strange Vol 4 #385 (2018)
2018-2020
One with the Void Sentry World
With a device called the Confluctor, Bob lives a dull daytime life and spends his nights as the Sentry inside a pocket world in his own mind, where his powers cannot release the Void on the real one. When the real Billy Turner, his former sidekick Scout, breaks into that world to take his place, Bob snaps, fuses with the Void into a dark version of the Sentry and kills him. Reed Richards later sends him into the Negative Zone to try to separate the two halves, and after the fight against the Cancerverse invasion the reunited Sentry chooses to stay behind and guard the universe he almost destroyed.¹²⁶²⁷²⁸
Key issues: Sentry Vol 3 #1 (2018) · Sentry Vol 3 #2 (2018) · Annihilation - Scourge Omega #1 (2020)
2021-2024
Death and a scattered legacy King in Black
Called home to fight Knull, the god of the symbiotes, the Sentry tries to tear him in half the way he once did Carnage, but Knull rips him apart and absorbs the Void. His ghost is swallowed by a corrupted Headless Celestial until Jane Foster and the Valkyries free it to move on, while Wilson Fisk's new Thunderbolts recover his body, which the Blasphemy Cartel later fills with ghosts as its 'Revenant Prime' until Clea and Doctor Strange destroy it. Fragments of his power then pass to several ordinary people, and Mallory Gibbs is the one who ends up using hers as a hero.¹²⁹³⁰³¹³²³³
Key issues: King in Black #1 (2021) · King in Black: Thunderbolts #1 (2021) · King in Black: Return of the Valkyries #4 (2021) · Strange Vol 3 #10 (2023) · Sentry Vol 4 #1 (2024)
2026
The Sentry is back Return
Alive once more, the Sentry turns up among the Avengers on the anniversary of the team's founding. The wiki says the returned Void now holds him to a bleak bargain: he lets it devastate alien worlds far away so that he can help people on Earth without interference, a trade that leaves him heavy with guilt. Back with Lindy, he announces his return to the world, helps the Fantastic Four stop a crystalline plague that has even infected the Hulk, and after his dog Watchdog dies he travels into the past to rescue Laika, the Soviet space dog whose death had stayed with him since he was seven, and makes her the new Watchdog.¹³⁴³⁵³⁶
Key issues: Avengers Vol 9 #34 (2026) · Sentry Vol 5 #1 (2026) · Sentry Vol 5 #4 (2026)

Capabilities

Superhuman strength

Lifts far beyond 100 tons; tore Carnage and Ares apart and has rivalled the Hulk, though his strength swings with his mental state.¹

Molecular manipulation

Can reshape matter at the molecular level; rebuilt his own body and beat the Molecule Man with this power.¹³⁷

Regeneration and immortality

Heals from almost anything, even being dispersed into molecules, and neither he nor the Void stays dead.¹

Nigh-invulnerability

Shrugs off attacks that would destroy almost any other being.¹

Flight and speed

Flies far past Mach 10 and has reached the Sun and back in moments; he can catch bullets.¹

Energy and light

Fires energy blasts and generates and shapes light, from a blinding pulse to constructs that block attacks.¹

Teleportation

Can teleport himself from place to place.¹

Source of power

Drank the Golden Sentry Serum, which shifted his molecules an instant ahead in time and gave him the power of a million exploding suns.¹²

Recorded feats

comics During the siege of Asgard, shrugged off an axe wound from Ares, then tore the war god in half; the wound healed soon after. Siege Vol 1 #2 (April 2010)¹⁹
comics Unleashed his full power on the Hulk across Manhattan, trading blows and pinning him down under a whirlwind of energy. World War Hulk Vol 1 #5 (January 2008)¹⁵
comics Recovered within a minute from a ray-gun shot to the face, then plunged into the Sun and regenerated. Dark Avengers Vol 1 #13 (March 2010)⁶
screen Caught Bucky Barnes's metal-arm punch in one hand, tore the arm off and used it to swat him across the room. Thunderbolts* (2025)³⁸³⁹
screen With one sweep of his arms, sent a shockwave that threw Yelena, Walker and Ghost across the room. Thunderbolts* (2025)³⁸³⁹
screen As the Void, spread a darkness across Manhattan that pulled New Yorkers into a realm of their worst memories. Thunderbolts* (2025)³⁸³⁹

Notes from the archive

The 2000 launch was built around a hoax: Wizard magazine ran a story about a 'lost' 1961 Sentry created by Stan Lee and an artist named Artie Rosen, which turned out to be a marketing stunt. Sentry #1 even had an 'Artie Rosen' variant cover.¹²
Writer Paul Jenkins appears as himself in New Avengers #7 (2005), and by #10 the story explains that Bob had unknowingly planted his memories in Jenkins's mind, which is why the Sentry's past existed only as comic books.¹¹⁰⁷
Steven Yeun was first cast as the Sentry in Thunderbolts* before dropping out, and Lewis Pullman took over. Pullman asked for the character's name to be changed because he had just played a 'Bob' in Top Gun: Maverick, but was told the name came from the comics.³⁹⁴⁰
According to the MCU Wiki, the Thunderbolts* writers first planned to keep the comics idea of the world being made to forget Bob, but dropped it because it was too close to the ending of Spider-Man: No Way Home.³⁹

Sources