Harrison Wells is the name of several characters portrayed by Tom Cavanagh in The CW's Arrowverse franchise, primarily on the television series The Flash.

Executive producers Greg Berlanti and Andrew Kreisberg, and DC Comics CCO Geoff Johns, created the character of Harrison Wells for The CW series The Flash,[1] although he is first mentioned in the Arrow season 2 episode "Three Ghosts".

[5] On February 10, 2014, Tom Cavanagh was cast in the role, described as "a rock star in the world of physics and the mind and money behind Central City's S.T.A.R.

[23] Cavanagh described Sherloque as "a very intelligent human being who is maybe not to be trusted",[24] and as being filled with "intrigue and deceit, fun, humor, intensity, and very loud.

"[31] Season six showrunner Eric Wallace described Nash as "a man who can kind of get in a fight and hold his own", unlike any previous version of Wells.

After much press coverage in 2013, he activates a particle accelerator that explodes, releasing dark matter energy that transforms various people into metahumans.

In 2014, Wells is now a recluse and pariah of Central City while he helps Barry Allen as the Flash to run faster to increase abilities as a speedster by taking down metahuman criminals.

[39] In 2000, the real Wells of Earth-1 was married to Tess Morgan, whom he met when they worked as research partners in Maryland,[40] and was friends with Tina McGee.

[42] In the present, Joe West's investigation into Tess's death eventually leads to Team Flash's discovery of Wells' corpse.

[47] Wells returns to 2020 Central City in possession of his doppelgängers' memories and feelings towards their various friends, such as Cisco Ramon and Caitlin Snow, to help Barry and Iris West-Allen restore the natural Speed Force and assist with the struggle against Eva McCulloch.

He later uses his new temporal manipulation abilities to live through any point in his own lifetime, which he intends to use to put himself in a time loop of his marriage with Tess; his powers lead to him being nicknamed "Timeless Wells" by Cisco.

The two, over Team Flash's objections, travel to the proper point in time and are nearly successful before ultimately aborting the plan in that doing this amounts to "murdering" the Forces of Nature.

[49] Wells appears in the series finale, advising Khione of the necessity of ascending as the natural order's protector and attends a party celebrating Nora West-Allen's birth.

[57] In season three, Harry approaches Team Flash, asking their help in dissuading Jesse, now a speedster, from being a superhero, but eventually comes to accept his daughter's intentions.

[62] In season four, Harry has returned to Earth-2 for undisclosed reasons, but Cisco mentions him as one of the scientists who assisted in developing a way to retrieve Barry from the Speed Force.

[65][66] He builds a "thinking cap" to augment his intelligence with dark matter to outwit DeVoe,[67] but the device is pushed past its safety limits and his brain is damaged;[68] now the more he uses his intellect, the faster he loses it.

Barry suggests letting the overbearingly good-natured H. R. stay a few weeks, and he proves his worth by helping form plans and locating powered criminals.

[79] Harrison Sherloque Wells, a detective from Earth-221,[80] is hired in season five by Team Flash to investigate the metahuman serial killer Cicada.

[88][73] Harrison Nash Wells, an explorer and self-proclaimed myth-buster from an unidentified Earth, comes to Earth-1 in season six in search of a substance called eternium, which he eventually finds in the sewers of Central City.

[89] After Team Flash offers to help, Nash reluctantly agrees and tells them he knows how to stop Barry's prophesied death during the impending Crisis.

[99] Team Flash ultimately learn that Nash is the only surviving version of Wells following the Crisis and was fused with all of his counterparts (explaining his hallucinations).

Unfortunately, Cecile Horton learns that Thawne is using his negative memories against him to finalize the possession, particularly the death of his partner and adoptive daughter Maya (Allegra's doppelgänger) who had died while on an adventure with him on Earth-13.

"[109] In September 2017, Irina Curovic of Comic Book Resources described Cavanagh's portrayal of the versions of Wells introduced to that point as "flawless", noting that, "Harry was the best fit for team Flash.

"[103] However, she criticized his portrayal of H. R. in the episode "Untouchable", feeling he was an "annoying character" who was "just another symbol of the show's inability to grow", with his only purpose being to "continue the Harrison Wells mythos.

"[112] Writing for Comic Book Resources, Stephanie Holland also criticized H. R., describing him as a "hipster Wells, who carries around drumsticks, wears a stupid hat and skinny jeans."

"[113] Digital Spy's Morgan Jeffrey felt H. R. did not contribute much to Team Flash except for "plenty of enthusiasm", and was "a tad annoying", but wrote that, by sacrificing his life to save Iris, H. R. "eventually proved his worth.

Club said this Council did not "make a whole lot of sense, even from a comic-book multiverse perspective", and that its members felt like "community theater skit characters.

"[118] Mike Cecchini of Den of Geek said he was initially skeptical of Sherloque during the character's introduction in the fifth season, but while reviewing the episode "Godspeed", said he turned into an "absolute delight".

He claimed that, despite the character's limited screen time in the episode, he used it "incredibly effectively", appreciating "the way that he doubles down on not telling the team about his Nora suspicions.

"[121] In contrast, Schedeen said that while Cavanagh was able to differentiate the various versions of Wells through subtle intonation, body language and personality changes, "Sherloque relied far too heavily on a silly French accent.