Doctor Alchemy (Arrowverse)

"I am Alchemy!"

- Doctor Alchemy

Doctor Alchemy is the secondary antagonist of Season 3 in The Flash. He is voiced by Tobin Bell, who also portrayed Jigsaw. In his civilian form, Julian Albert, he is portrayed by Tom Felton who also portrayed Draco Malfoy and Dodge Landon.

Alchemy is the leader of a cult worshipping Savitar, the Hindu God of Motion. He is also the split personality of C.S.I. Julian Albert, who himself is not aware what happens when Alchemy takes over his body. In Central City, Alchemy starts giving back powers to those who had them in Flashpoint, including the Rival, Magenta and Kid Flash. Eventually, when their temple is attacked by the Flash, the cult and Alchemy are aided by Savitar.

Approaching the Rival
After Barry has dissolved the Flashpoint-timeline and returned to what he believes is the former timeline, present-day Edward Clariss is woken up by a mysterious voice. He looks around to see that the word "Alchemy" is being driven into his mirror.

While Clariss is taking a bus ride, he is once more called by Alchemy and sees that the word Alchemy is being scratched into the bus window. Clariss, seemingly led by Alchemy, reaches a undergound temple where many cloaked men are kneeling. One of them gets up and turns around, revealing himself as Doctor Alchemy. He tells Clariss, who is having flashbacks of his Flashpoint identity Rival, that there is a way to get Clariss his speed back, asking him if he wants that. Clariss replies that he would indeed want that very much.

Clariss and Alchemy later set a trap for Barry. After Barry, who believes to be tracking down Clariss, arrives, he is attacked by Doctor Alchemy who uses a certain stone to shoot an energy blast at Barry. While Barry is being attacked by Alchemy, the perplexed speedster asks Alchemy what he wants. Alchemy reveals that he is helping people like Clariss achieve their true potential. He also claims to be preparing this world but does not reveal for what. Clariss then attacks Barry but is ultimately defeated. However, Alchemy is nowhere to be found and video feed of the attack also do not show that he was ever there.

Barry and his team later assume that Alchemy plans to give powers back to everyone who had them in the Flashpoint-Timeline, with Clariss being one of them. As a husk, an empty shell of Clariss, had been found by the GCPD right after Clariss got his powers back, the team assumes that the husks are signs of Alchemy giving powers to someone. As four of these husks have already been found, the team deduces that four people must still be around Central City. The same night, Alchemy visits Edward Clariss in his prison cell and has Savitar murder him for failing to fulfil Alchemy's orders.

Returning more Flashpoint-powers
Alchemy later equips Frankie Kane with the powers she had in Flashpoint, creating Magenta. After some time, Magenta heads to the lair of Alchemy where she reveals that she wants to drive Frankie out of her body to exist entirely as Magenta. However, she senses that Frankie is still inside her body. Alchemy tells her to show her abusive father John that she is in control now, and that Frankie will know then as well.

Similar to how he contacted Magenta, Alchemy also contacts Wally West through his dreams. Although Alchemy's attempts to contact Wally at first manifest in the young man's dreams, the dreams eventually surface in real life, causing Wally to fall to the ground twitching. This leads to the team growing more and more concerned about Alchemy's possible influence over Wally. To his own protection, Wally is imprisoned in the pipeline but once Barry is distracted by the meta-human Shade, Alchemy contacts Wally once more. He promises Wally to end the hallucinations and dreams once Wally comes for him to receive his powers.

Barry and his team later device a trap for Alchemy. By following Wally, who is answering Alchemy's call, Barry, Joe and a CCPD SWAT team reach Alchemy's headquarter in an abandoned subway tunnel. Alchemy and a group of his followers are welcoming Wally and Wally talks to Alchemy about his dreams of having speed. Alchemy claims that he can give these powers 'back' to Wally should he desire this. However, Wally instead claims that he wants Alchemy and his disciples gone. Alchemy realizes that this is a trap and warns his followers. Barry then speeds into the room, swiftly using nearby chains to chain up Alchemy's followers. In the meantime, Alchemy obtains his power stone and blasts a beam of energy into Barry, sending him flying back through the room.

Savitar
Alchemy continues blasting energy bolts into Barry, claiming that the Flash will never again stand between 'what must be'. However, Alchemy is then shot in the back by Joe, causing him to stumble, drop his stone and fall to the ground. He is immediately surrounded by the SWAT team who force him to surrender. Barry gets back up again as well, claiming that Alchemy's plans are over. Unimpressed, Alchemy replies that none of them have any idea of what's about to begin. The same moment, the sinister deity Savitar speeds into the room, killing the SWAT team and freeing Alchemy's disciples. In the resulting chaos, he contacts Wally telepathically, urging him to pick up the stone to take his destiny but once Wally picks it up, he is engulfed in an energy column. Once this is done, Alchemy picks up his stone again and runs off. Although he is shot at by Joe he is able to escape unharmed.

Days later, it is revealed that Alchemy is in truth a split personality of Julian Albert, Barry's rival in the CCPD. When leaving the hospital he was in due to an attack of Killer Frost, he is approached by Savitar on the street. Savitar urges Albert to become Alchemy again in order to bring about Savitar's true return. Julian returns home where he opens a closet, looking at the mask of Alchemy in suspicion.

Trivia

 * His last name Albert is a reference to Albert Desmond, the first Doctor Alchemy in the comics