[1] Stein is initially unaware of their dual identity and unable to remember his actions while transformed before Ronnie informs him of the truth.

His first major story arc sees Firestorm attempting to convince the United States and the Soviet Union to destroy their nuclear weapons.

[1][10] In One Year Later, Stein's former assistant Adrian Burroughs / Pupil kidnaps and tortures him before Jason Rusch and Firehawk free him.

[15][16] Despite this, the two continue to work together until Lazarus Pit resin corrupts the Firestorm matrix and causes Stein to age rapidly.

[18] This version experimented on humans to unlock the secret of life through death, transforming into Deathstorm and becoming a member of the Crime Syndicate of America.

[20] Martin Stein / Firestorm appears in media set in The CW's Arrowverse, portrayed by Victor Garber.