Dr. Curtis Engstrom is an advisor on the project when S.T.A.R. Labs acquired the Philosopher Stone with intentions of using one of its fragments in their microscopic medical computer.[3] He stole the computer and fragment but he was later arrested. After escaping from prison, Engstrom donned his own Dr. Alchemy costume and set out to retrieve the microchip that had been taken from him by his former cellmate where he became the Alchemist. After being defeated, Engstrom was never seen again.