Bruce Wayne (David Mazouz) is set to meet one of his most trusted allies in the second-to-last episode of the first season of Fox's Gotham.

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Lucius Fox is set to be introduced in the second-to-last episode of the season, according to Deadline. Actor Chris Chalk is playing the trusted confidant of Bruce, making his first appearance in the 21st episode of the season.

"His desire to help Bruce uphold Thomas Wayne's legacy eventually will earn him a spot as one of the boy's most important confidants," the site described.

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Batman fans likely already know that Lucius Fox is an important character to the Batman universe. He was played by Morgan Freeman in the Dark Knight trilogy on the big screen.

Chalk's credits include Showtime's Homeland and FX's Justified in addition to the Broadway play Fences. The actor will apparently have the option to star in season 2 after his debut appearance in episode 21.

As Lucius Fox is introduced, another character will be saying goodbye in the final four episodes of the season. Fish Mooney (Jada Pinkett Smith) will not be featured beyond the first season of Gotham, with the actress saying that it was always going to be a one-season deal for her.

Smith certainly made an impact on Gotham in the first season as she was one of the only original characters who did not previously come from the comics.

Gotham returns with a new episode on Monday, April 13 at 8 p.m. ET/PT on Fox.

Tags: Gotham television fox