[3] The miniseries ran for five issues and then segued directly into a series of flashback one-shots in which the Sentry teamed up with the Fantastic Four, Spider-Man, Angel of the X-Men, and the Hulk.

[5] Middle-aged, overweight Bob Reynolds remembers that he is Sentry, a superhero whose "power of one million exploding suns" is derived from a special serum.

[6][7] Realizing that his archenemy the Void is returning, Reynolds seeks out several prominent Marvel characters to warn them and to discover why no one remembers the Sentry.

Meanwhile, the general public gradually came to remember the Sentry, as did Reynolds' old sidekick, Billy Turner, who was formerly known as the Scout (now scarred and missing a forearm, due to an attack from the Void).

[10] The Sentry, returned as a hero, captures the hearts of the public while newspapers refer to him as "the Golden Guardian of Good", and he saves hundreds of lives on a daily basis.

Later, during an office visit, Cornelius confronts Robert with this fact, showing him newspaper articles that indicate that the Sentry's heroic exploits are seemingly balanced in equal measure to other horrific deeds committed by the Void.

[12] After a bright muzzle flash, Dr. Worth notices that he is still alive, and the Sentry, having seemingly remained still, opens his hand to reveal the fired bullet.

Suddenly, a man's voice through a loud speaker tells him that he is a mental patient who has undergone shock therapy and has awakened from a deep slumber, and that his name is John Victor Williams.

After a time, the Sentry seemingly accepts this new version of reality, believing himself to possibly be John Victor Williams, and a prisoner in a psychiatric care facility.

squad to battle Wolverine and tells him that he doesn't want to get involved but sees no choice; he claims he has to stop the ugly business even if that means becoming part of it for a while.

[18] Trying to escape from the battle, believing that every path he can choose will ultimately lead to the death of people he knows (one of his thoughts at this point consists of himself and Hulk triumphantly returning to Earth and 'ending' the war via killing all the heroes), Sentry retreats to the moon, where he is confronted by the Inhumans living there.

While at first there is some dispute between the Sentry and his wife, Robert joins the team while Tony Stark and Ms. Marvel offer him assistance to battle his mental issues.

You'll have to handle this one yourselves....Against an opponent this powerful...The amount of energy I'd have to expend...if I...lost control, for even a millisecond...After watching the events on TV and witnessing the Hulk apparently deciding, in Roman-style, to force Mister Fantastic to kill Iron Man, he leaves his home stating that, "It's time to play god".

However, after years of dating and being married to the world's most powerful mutant telepath Jean Grey, Cyclops uses all that she taught him to successfully lock the Void inside an unbreakable psychic prison within his own mind.

Ms. Marvel muses that the Scarlet Witch's reality-rewriting nervous breakdown was negligible in comparison to the threat posed by the Sentry losing control.

[40] After shooting Robert, apparently killing him, Lindy records Sentry's origins as a drug addict (previously revealed) and that he found the Professor's super serum by accident.

The Sentry has effortlessly defeated and broken the handle of the axe of Terrax,[63] a herald of Galactus shown as powerful enough to slice planets in half;[66] severely pummelled and nearly torn apart the female Ultron;[67] and easily shattered shields of Doctor Doom.

On some of these occasions, he overloaded the abilities of the Absorbing Man;[69] and fought an enraged Hulk for a prolonged period of time until both fighters reverted to their human forms, whereupon Reynolds was knocked unconscious by Banner.

The Sentry possesses tremendous powers of energy projection, from both his hands and eyes,[72] capable of harming even the Hulk (in his Green Scar incarnation).

[75] He eventually found out that all his powers apparently derive from abilities similar to those of the virtually omnipotent Molecule Man, which he uses to take control of the latter's body and resurrect himself multiple times after seemingly being annihilated.

In the 2009 storyline "Utopia", it was temporarily separated from his being, with a "shard" of its essence placed within Emma Frost which is later transferred to Scott Summers and currently resides locked away in his mind.

[78] Several reasons for the existence of the Void have been given: the innate division between good and evil in any nominally normal person;[citation needed] a "mind virus" put into place by the mutant Mastermind by order of the crazed General;[77] the idea that the Void is in fact the true personality of Rob Reynolds and the Sentry is the false one;[79] as mentioned above, the result of covering up his past;[41] and, according to Norman Osborn the Sentry's superhumanity eroded his humanity, leading to a 'void' in his life.

[citation needed] The Void possesses the ability to shape-shift, and through its control over the weather and darkness it can create destructive storms and deadly "infini-tendrils" that attack the mind.

[citation needed] It is at its strongest during the night and in the Negative Zone (which is also Blue Marvel's source of his strength & power), where it has shown itself capable of easily overpowering the Hulk by breaking every single bone in his body in moments.

[81] Joining Sentry to take on the Void are his sidekick, Scout, his loyal canine companion Watchdog and his equal, Sentress, a woman named Jenny.

After the Sentry made the entire world forget of his existence with the help of Mister Fantastic and Doctor Strange to stop the Void, Billy went on to live a normal life.

This miniseries follows Bob as he attempts to warn other Marvel characters about the return of his foe, whilst also figuring out why no one can remember his superhero alter-ego.

[105][106][107] Joshua Davison of Bleeding Cool wrote, "Sentry #1 is another excellent self-conscious superhero title from Jeff Lemire, and it does so without going fully meta, which is an overused tactic in modern comics.

"[108] Adam Barnhardt of ComicBook.com gave Sentry #1 a grade of 5 out of 5, saying, "Lemire's ability to write the internal conflicts his protagonists face is second to none and after his iconic run on Moon Knight, a comic with Robert Reynolds was a long time coming.

He's able to craft tales where the readers struggle to separate fact and fiction, yet everything eventually falls into place, and that's exactly the type of writer a character like Robert Reynolds needs.