Raven Metzner ('Sleepy Hollow') will replace Scott Buck on the forthcoming second season of the Marvel drama.

There's a change behind the scenes at Netflix's Marvel drama Iron Fist.

Raven Metzner (Sleepy Hollow) has been tapped to replace Scott Buck as showrunner for season two.

"Raven’s love of all things Iron Fist and his extensive knowledge of martial arts films made him the perfect choice to continue telling the adventures of Danny Rand and Colleen Wing," Marvel's head of television and Iron Fist executive producer Jeph Loeb said Saturday in a statement. "Season one and The Defenders are only the beginning of this fantastic action-packed tale."

Sources tell The Hollywood Reporter that Iron Fist is bringing in an entirely new writers room for season two that will be more grounded than the first season.

The news comes a day after Loeb announced at San Diego Comic-Con that the show had been renewed for a second season. The panel was timed to the forthcoming Defenders miniseries, which will see Iron Fist (Finn Jones) team with fellow Netflix Marvel characters Daredevil, Luke Cage and Jessica Jones.

While Netflix's first three Marvel series were well-received by critics, Iron Fist was not. THR TV critic Daniel Fienberg called the drama, which debuted in March on the streaming giant, Marvel's and Netflix's "first big misstep."

Iron Fist also met controversy early in its run for casting a Caucasian rather than an Asian-American actor in the lead role, despite the character being depicted as a blond Caucasian (which Jones is) in the comics on which the series is based.

Metzner is no stranger to the Marvel universe, having written the 2005 Daredevil spinoff film Elektra starring Jennifer Garner. His TV credits include Heroes: Reborn, Falling Skies and Daybreak. Metzner is repped by WME.