Jesse L. Martin has signed on to bring law and order to The Flash.

Martin will play Det. West in the Arrow spin-off’s pilot based on the DC Comics hero, our sister site Deadline reports. Grant Gustin (Glee) stars in the CW project as its titular crimefighter, aka Central City forensics investigator Barry Allen.

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West is described as a trustworthy father figure to Gustin’s Barry, who was introduced in Episode 8 of Arrow‘s current season.

David Nutter (The X-Files) will direct the pilot, which was written by DC Comics Chief Creative Officer Geoff Johns and Arrow EPs Andrew Kreisberg and Greg Berlanti.

Martin played L&O‘s Det. Ed Green for nine years and had a role in Smash‘s second season.