The Nuclear Man

"He's not even Ronnie anymore he's Martin Stein walking around in Ronnies body "

—Caitlin explains Firestorm

"The Nuclear Man"
Information
Episode number	13 of 184
Original airdate	February 10, 2015
Written by	Andrew Kreisberg Katherine Walczak
Directed by	Glen Winter
Guest stars
Victor Garber as Martin Stein (special guest star) Clancy Brown as General Wade Eiling (special guest star) Robbie Amell as Ronnie Raymond Bill Dow as Quentin Quale Michelle Harrison as Nora Allen Isabella Hofmann as Clarissa Stein Malese Jow as Linda Park Chase Masterson as Sherry Herbert Duncanson as Sergeant Bates Morena Baccarin as Gideon (voice)
Chronology
Preceded by	"Crazy for You"
Followed by	"Fallout"

"The Nuclear Man" is the ???th episode of The Flash. It aired on February 10, 2015.

"The Nuclear Man" is the thirteenth episode of the first season of The Flash, and the thirteenth episode overall. It aired February 10, 2015.

Synopsis

After Ronnie attacks a physicist, Barry and the team realize they need to go after Caitlin's fiancé who is now a dangerous meta-human. They deduce the best way to track Ronnie is to find Dr. Martin Stein who was working on a project called F.I.R.E.S.T.O.R.M.. Barry struggles to balance his duties as The Flash and his relationship with Linda Park, and Joe enlists Cisco's help to reinvestigate the murder of Nora Allen. General Eiling returns to Central City.

Behind the scenes

• The episode's title is a reference to the debut issue of Firestorm, Firestorm - The Nuclear Man.
• When he encounters Firestorm outside the Steins' house, Barry asks him not to "flame on." This phrase is utilized by Johnny Storm/the Human Torch, a Marvel Comics character with similar powers to The Flash's Firestorm, when activating his powers.
• When Barry mentions his plan for their second date to Linda, he mentions "Mal Duncan, who's playing at an underground jazz club". In the DC comics, Malcolm "Mal" Duncan was one of DC's first black superheroes, Hornblower, who could play a horn which opened up multi-dimensional portals. During his time spent with The Teen Titans, Mal Duncan owned a nightclub which was frequented by his team mates.
• Harrison Wells mentions the "Firestorm Matrix" inside Ronnie and Professor Stein. In the DC comics, the Firestorm Matrix is an established plot point with in-depth details as to how the Firestorm persona works, similar to the Speed Force with speedsters.