<P> This is a list of recurring actors and the characters they portrayed in multiple episodes, which were significant roles, sometimes across multiple seasons . The characters are listed, in alphabetical order by actor, by the season in which they first appeared . </P> <Ul> <Li> Robbie Amell portrays Ronnie Raymond / Firestorm, an engineer at S.T.A.R. Labs and Caitlin Snow's fiance', based on the DC Comics character of the same name who is half of the character Firestorm . He is thought to be dead in the particle accelerator explosion, saving the lives of his co-workers . He survived the accident, which merged him with Martin Stein and the F.I.R.E.S.T.O.R.M. transmutation matrix, transforming both of them into one pyrokinetic entity . Though Firestorm is Ronnie's body, it is Stein who remains in control for most of their existence, with Ronnie occasionally taking control for brief moments . They eventually learn to control their shared powers, including an ability to separate themselves at will . Like Caitlin, Cisco and Stein, Ronnie also becomes good friends with Barry Allen; he and Barry ultimately join forces with Oliver Queen to subdue the Reverse - Flash . Ronnie marries Caitlin, though he is presumed dead when he sacrifices himself to stop the singularity above Central City, giving a final goodbye to Caitlin . <Ul> <Li> Amell also portrays the Earth - 2 version of the character, Ronnie Raymond / Deathstorm, who is Killer Frost's husband . He works for Zoom alongside Killer Frost and Reverb . Ronnie is killed by Zoom for harming the Flash . </Li> </Ul> </Li> <Li> Stephen Amell portrays Oliver Queen / Green Arrow, a former billionaire playboy and politician who operates as a vigilante in Star City and is a friend of Barry's . Amell stars as the character on Arrow . <Ul> <Li> In opposition to what happened on Earth - 1, the Earth - 2 version of the Arrow is Robert Queen and Oliver died instead . </Li> </Ul> </Li> <Li> Clancy Brown portrays General Wade Eiling, a U.S. military general with an interest in metahumans, who wants to use them for the army, and has a history with S.T.A.R. Labs . When Eiling is revealed to have learned of Barry Allen's identity as the Flash, Eobard Thawne gives the general to Grodd to be placed under the gorilla's control . After being freed by the Flash, he and Barry form a grudging respect despite their enmity . </Li> <Li> Victor Garber portrays Professor Martin Stein / Firestorm, a nuclear physicist focused on transmutation, based on the DC Comics character of the same name and is also half of the character Firestorm . During their initial merging, Stein remains in control of Firestorm, though Ronnie Raymond occasionally takes control for brief moments . They eventually learn to control their shared powers, including an ability to separate themselves at will . Professor Stein also subsequently gives Barry Allen and Eddie Thawne some insight on the possibility of time travel and their respective destinies . Stein also discovers Cisco Ramon's secret as a metahuman and encourages him to accept the status . After Ronnie's presumed death, Stein becomes a member of Team Flash and the group's scientific advisor following Eobard Thawne's demise . When it turns out that his body is unstable as a consequence of the combination of the dark matter with Stein's own matrix, his fusion with Ronnie stabilizing him, Stein gains a new partner in Jefferson "Jax" Jackson . In season three, Stein discovers that due to both Barry's and his own respective time - traveling actions, he now has a daughter, Lily, with his wife in the post-Flashpoint timeline; he never had a child due to his fear of being as neglectful as his father and his past commitments to his work prior to the timeline's reset . Martin eventually discovers that he is actually a good father to Lily in the new timeline and loves his daughter . <Ul> <Li> The Earth - 2 version of the character is also one half of the conjoined metahuman criminal Deathstorm . This version of Ronnie doesn't release Stein or even listen to him and he eventually stops talking altogether . He is unwillingly killed by Zoom . </Li> </Ul> </Li> <Li> Michelle Harrison portrays Nora Allen, Barry Allen's mother . Although the Reverse - Flash was actually trying to kill the young Barry during the fight with the Flash's future self, Nora was instead Reverse - Flash's target after Flash took the younger Barry to safety, figuring that such a tragedy would prevent Barry from becoming Flash . Nora also appears as one of the Speed Force manifestations that helps Barry get to terms with her death . <Ul> <Li> Harrison voices the Earth - 2 version of the character . On this Earth, she remains happily married to Henry Allen . </Li> </Ul> </Li> <Li> Roger Howarth portrays Mason Bridge, a reporter at the Central City Picture News who mentors Iris West and who has become suspicious of Eobard Thawne and has even found evidence of Simon Stagg's murder when everyone believes Stagg is a recluse . Eventually, Mason is killed by the Reverse - Flash, erasing all evidence to keep secrets . However, Mason's disappearance causes a chain of events that lead Barry Allen and Joe West to discover that the reporter is murdered for getting close to the truth about Thawne . When Iris is worried and begins looking into Mason's disappearance, Eddie Thawne covers with the story that Mason ran away for a girl, but Iris eventually learns the truth for herself . </Li> <Li> Malese Jow portrays Linda Park, a journalist for the Central City Picture News who befriends Iris West and Barry Allen, and briefly dated Barry . The character was originally portrayed by Olivia Cheng in the series Arrow . <Ul> <Li> Jow portrays the Earth - 2 version of the character, Linda Park / Doctor Light, based on the Kimiyo Hoshi version of the character . Unlike her Earth - 1 counterpart, this Linda is a thief who is very easily startled and paranoid and willing to do anything to stay out of Zoom's sights . </Li> </Ul> </Li> <Li> Matt Letscher portrays Professor Eobard Thawne / Reverse - Flash, the time - travelling archenemy of Barry Allen / Flash from the future and a descendant of Eddie Thawne, based on the DC Comics character of the same name . Hailing from the 22nd century, Eobard was obsessed with the Flash, and desired to "become" his idol . Having spent years figuring out how the Flash came to be, he managed to successfully duplicate the reaction and become a speedster--only for Eobard to subsequently discover, through time travel, that he was destined to become his idol's greatest enemy, that he would never become his hero, and grew to despise him . Hell - bent on proving himself superior, Eobard would become the "reverse" of everything the Flash was, making it his life's mission to "take" as much as he can from the man he once looked up to, as the Reverse - Flash . The two enemies, rivals and opposites would then have subsequent encounters for years, neither one of the two speedsters strong enough to defeat the other . At one point in his life, the Reverse - Flash, who had traveled to 2024, vanishes with the Flash in the midst of a "crisis". After finally discovering his nemesis' identity, Eobard murders Nora Allen after a failed attempt to kill Barry as a child, but loses his connection to the Speed Force in the process and became stranded in the past . He then transmutes the likeness of Dr. Harrison Wells as his own appearance, serving as season one's main antagonist by orchestrating and manipulating various events in hopes of returning to his time period, until Eddie sacrifices himself in the first - season finale, causing Eobard's existence to cease . Eobard's first chronological appearance occurs in season two; the Reverse - Flash travels back in time to 2016, encountering the Flash for the first time (from Eobard's perspective). In the midst of using Tina McGee's "speed machine" construction to return to his time period via tachyons, he suffers a severe beating at the Flash's hands . While being briefly imprisoned at S.T.A.R. Labs, he came to know about some of his own future actions after interactions with the Flash, Cisco Ramon and Harry Wells . In order to prevent a time paradox, Eobard is sent bent back home, but not before vowing to return and learn the Flash's name . In the second - season finale, the Flash travels back to prevent the Reverse - Flash from murdering Nora, altering some significant events . In season three's premiere, Eobard is imprisoned by Barry while they're both in the Flashpoint timeline, trying to convince his nemesis to restore the reality they both know, which Barry is initially against . But when Barry starts losing memories and realizes this new timeline's dangers, Eobard is reluctantly released . The Reverse - Flash then travels back and murders Nora, which supposedly "fixes" the timeline . Eobard then brings Barry back to the different timeline and leaves, but not before taunting his nemesis . </Li> <Li> Peyton List portrays Lisa Snart / Golden Glider, an aspiring criminal and Leonard Snart's younger sister . She shares a mutual attraction with Cisco Ramon who she initially kidnapped for her brother and coerced into creating a gun that turns things into gold, but becomes genuinely fond of later on . Although she helped her brother free the metahuman criminals in the Pipeline, Lisa sought Team Flash's help when her brother was found to be working for their abusive father Lewis Snart (later revealed to be due to her father threatening her life). </Li> <Li> Liam McIntyre portrays Mark Mardon / Weather Wizard, a criminal with the ability to control the weather of his surroundings . Having similar powers to his sibling, Mark returns to Central City seeking revenge on Joe West for killing his brother . He was being held in the S.T.A.R. Labs prison before being set free by Leonard Snart and being offered a place in his crew the "Rogues". Mark also murdered Patty Spivot's father during a bank robbery with his brother months prior to the particle accelerator's explosion . He remains nursing his grudge against both Joe West and the Flash . </Li> <Li> Wentworth Miller portrays Leonard Snart / Captain Cold, the son of a police officer and Lisa Snart's brother who turns to crime and uses a stolen cryonic technology weapon . Snart is a cunning and intelligent bank robber who seeks to eliminate the Flash, seeing as a threat to his world, and steals a gun from S.T.A.R. Labs that is able to freeze objects and people on contact; Cisco originally created the weapon to stop the Flash if something went wrong . Snart teams up with Mick Rory in an attempt to kill The Flash but fails and yet gets The Flash to reveal to the world that he exists . He also learns from Cisco, after threatening to kill Dante Ramon, that Barry Allen is the Flash . He eventually becomes leader of his crew that Barry dubs the "Rogues". Barry later asks Snart to assist him in transporting metahumans out of Central City to Lian Yu . Snart accepts, in exchange for Barry erasing Snart's criminal record . He double - crosses Barry by sabotaging the truck containing Mark Mardon / Weather Wizard, Kyle Nimbus / The Mist, Roy Bivolo / Rainbow Raider, Jake Simmons / Death Bolt and Shawna Baez / Peek - a-Boo . Snart kills Simmons with his cold gun, claiming Simmons owed him money . Leonard is later extorted into working for his father, Lewis Snart, when he plants a bomb inside Lisa's head . After Team Flash successfully removes it, Leonard kills Lewis out of spite and is arrested for his father's murder, which he doesn't try to resist . He is later broken out by Mardon to aid in getting revenge on Barry but declines and warns Barry of Mark's plans . Snart was in the process of a robbery the night of the particle accelerator explosion, causing the creation of Sam Scudder and Rosa Dillon into meta - humans . Scudder and Dillon seek revenge against Snart, and Barry reveals that Oliver mentioned he is traveling with some friends of theirs, called the Legends . During the alien attack, the Legends appear, prompting Barry to ask Ray Palmer Snart's whereabouts, with Ray informing him that Snart sacrificed himself to save the team, proving to be a hero . Months later, Barry recruits Snart from a point in time where he was traveling with the Legends in an attempt to steal Dominator technology from ARGUS . The two succeed, and Snart is returned to the Legends . <Ul> <Li> The Earth - 2 version of the character is the mayor of Central City . </Li> </Ul> </Li> <Li> Danielle Nicolet portrays Cecile Horton, the Central City district attorney and a close friend of Joe West . In season three, she and Joe begin a romantic relationship . </Li> <Li> Amanda Pays portrays Tina McGee, a role she also played on the 1990 television series . A friend of Harrison Wells (Earth - 1 version), she is the director of Mercury Labs and the designer of the tachyon device, which allows any object to move at the speed of light, stolen by the Reverse - Flash once during season one and again in season two . Dr. McGee is aware of Barry's secret for some time but keeps this knowledge to herself . </Li> <Li> Dominic Purcell portrays Mick Rory / Heat Wave, an arsonist and accomplice of Leonard Snart who, in contrast to his partner, uses a heat gun developed by Cisco Ramon capable of burning almost anything . However, Mick's obsession for maximum destruction and failure to think causes tensions between him and Snart that even his own partner has even been tempted to kill him . </Li> <Li> David Ramsey portrays John Diggle / Spartan, a member of Oliver Queen's team and best friend to Oliver . Ramsey stars as the character on Arrow . </Li> <Li> Ciara Renée portrays Kendra Saunders / Chay - Ara / Hawkgirl, a young woman who is beginning to learn that she has been repeatedly reincarnated over the centuries . When provoked, her ancient warrior persona manifests itself, along with wings that grow out of her back, earning her the moniker Hawkgirl . She is a potential love interest for Cisco Ramon . </Li> <Li> Emily Bett Rickards portrays Felicity Smoak, a friend and love interest of Oliver Queen, and also a one - time love interest of Barry Allen . Rickards stars as the character on Arrow . </Li> <Li> Patrick Sabongui portrays David Singh, the Central City Police Captain, and superior of Barry Allen, Joe West, Eddie Thawne, Patty Spivot and Julian Albert . <Ul> <Li> Sabongui also portrays the Earth - 2 version of the character, a criminal . </Li> </Ul> </Li> <Li> John Wesley Shipp portrays Henry Allen, Barry's father . Shipp previously portrayed Barry Allen / Flash in the 1990 television series . Henry was a respectable doctor before he was wrongfully convicted of murdering his wife Nora Allen and incarcerated in Iron Heights Prison after Eobard Thawne / Reverse - Flash framed him . Only his son Barry and later Joe West believe his innocence . Throughout season one, he learns that Barry is the Flash and is proud of his son . Henry serves as Barry's moral conscience in using these powers wisely, thus keeping Barry from being tempted for personal gains . In season two, Henry is released from prison upon the discovery of Eobard's confession to Nora's murder . However, he leaves Central City to seek a reclusive life as he believes that his presence could hold back Barry's duties as the Flash . He returns later to counsel Barry and offer encouragement after his son's disastrous fight with Hunter Zolomon / Zoom before returning to his seclusion . De-powered, Barry visits his father and Henry then accompanies his son and joins S.T.A.R. Labs to help in Barry's fight to save the world from Zoom . Henry is killed by Hunter when he wants Barry to relive the same tragedy he went through as a child . <Ul> <Li> Despite not appearing, it is implied that the Earth - 2 version of the character remains happily married with Nora Allen . </Li> <Li> Shipp also portrays the Earth - 3 version of the character, Jay Garrick / Flash . Zoom held Jay captive in a failed attempt to harness his speed, and was inspired to take up his persona and falsely operate as the Flash of Earth - 2, even using Jay's name . To keep him from escaping, Zoom forced Jay to wear a mask that suppressed his speed and prevented him from talking . After Zoom's defeat, Barry rescues Jay, who travels with Harry and Jesse Wells back to Earth - 2 . Jay adopts Hunter's Flash helmet as a symbol of hope, taking satisfaction in taking something from Zoom just as Zoom had done to him . Jay learned from Harry that Henry Allen, who was murdered by Zoom, is his doppelgänger and Barry is Henry's son . Knowing this, Jay watches over Barry, and acts as a sympathetic yet stern mentor . He explains Barry that time travel can have adverse consequences and that Barry must live with his mistakes . Barry later seeks Jay's help with battling Savitar; they initially succeed in banishing Savitar to the Speed Force, he later escapes, with Jay taking his place . After being freed, Jay joins Team Flash in the final battle to defeat Savitar . <Ul> <Li> Regarding the difference in his portrayal of Garrick over Allen, Shipp "figured Jay is my version of Barry" from the 1990 series, adding, "I went back and I watched a couple of episodes of the 1990 / 91 version to kind of remind myself what I did . (Jay) is much more reminiscent of my Barry Allen from 25 years ago than my Henry Allen . I went back and I was amazed how much attitude my Barry Allen had in some situations . I went back and I picked up that thread and I brought it forward 25 years, and tried to weave it in ." </Li> </Ul> </Li> </Ul> </Li> <Li> David Sobolov voices Grodd, a hyper - intelligent gorilla with telepathic powers as a result of being experimented on by General Eiling under the watch of Eobard Thawne . He is sent to the Gorilla City on Earth - 2 by Flash and later plans an attack to Central City with an army of the gorillas like him . However, he is defeated by Flash, Kid Flash, Jesse Quick, and Solovar, and imprisoned at A.R.G.U.S. </Li> </Ul> <Li> Robbie Amell portrays Ronnie Raymond / Firestorm, an engineer at S.T.A.R. Labs and Caitlin Snow's fiance', based on the DC Comics character of the same name who is half of the character Firestorm . He is thought to be dead in the particle accelerator explosion, saving the lives of his co-workers . He survived the accident, which merged him with Martin Stein and the F.I.R.E.S.T.O.R.M. transmutation matrix, transforming both of them into one pyrokinetic entity . Though Firestorm is Ronnie's body, it is Stein who remains in control for most of their existence, with Ronnie occasionally taking control for brief moments . They eventually learn to control their shared powers, including an ability to separate themselves at will . Like Caitlin, Cisco and Stein, Ronnie also becomes good friends with Barry Allen; he and Barry ultimately join forces with Oliver Queen to subdue the Reverse - Flash . Ronnie marries Caitlin, though he is presumed dead when he sacrifices himself to stop the singularity above Central City, giving a final goodbye to Caitlin . <Ul> <Li> Amell also portrays the Earth - 2 version of the character, Ronnie Raymond / Deathstorm, who is Killer Frost's husband . He works for Zoom alongside Killer Frost and Reverb . Ronnie is killed by Zoom for harming the Flash . </Li> </Ul> </Li> <Ul> <Li> Amell also portrays the Earth - 2 version of the character, Ronnie Raymond / Deathstorm, who is Killer Frost's husband . He works for Zoom alongside Killer Frost and Reverb . Ronnie is killed by Zoom for harming the Flash . </Li> </Ul>

Who plays caitlin's fiance in the flash