The Waverider will add a new crew member for the upcoming third season of DC's Legends of Tomorrow.

The CW has announced that Tala Ashe (American Odyssey) will join the cast as Zari Adrianna Tomaz, a character better known to DC Comics fans -- not to mention viewers of 1970s Saturday-morning television -- as the superheroine Isis.

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Ashe's character is described by the network as a Muslim-American woman from the year 2030 who lives in a world of contradictions: "Technology has brought about incredible change in her future — too bad human nature hasn’t kept pace. Fear, prejudice and a lack of care for the planet have forced Zari to become a “'grey hat hacktivist.' A computer nerd with a wry, combative attitude. A woman living a double life who doesn’t realize that she has secret, latent powers derived from an ancient, mystical source."

That description deviates from both the heroine's earlier TV roots and her more recent comic book origins while keeping the "ancient, mystical" elements.

Joanna Cameron on The Secrets of Isis
Joanna Cameron on The Secrets of Isis

The character was introduced in 1975 on the live-action CBS series The Secrets of Isis as a counterpart to Captain Marvel, and the two shared The Shazam/Isis Hour on Saturday mornings. Joanna Cameron starred as Andrea Thomas, a high school science teacher who could summon the powers of the goddess Isis -- flight, super-strength and super-speed among them -- by using an Egyptian amulet she discovered at an archaeological dig. Isis also starred in her own DC Comics title, which ran for just eight issues from 1976 to 1978.

The publisher reintroduced the character in 2002 as a goddess and then, in 2006, as an Egyptian woman named Adrianna Tomaz (an homage to Andrea Thomas) who in the series 52 is given the magical Amulet of Isis by Black Adam and Captain Marvel, which imbued her with a range of abilities, including healing and control over nature.

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Ashe, whose TV credits also include Smash, 30 Rock and Law & Order, joins a Legends of Tomorrow cast that includes Victor Garber as Martin Stein, Arthur Darvill as Rip Hunter, Dominic Purcell as Mick Rory/Heat Wave, Caity Lotz as Sara Lance/White Canary, Franz Drameh as Jefferson “Jax” Jackson/Firestorm, Brandon Routh as Ray Palmer/Atom, and Nick Zano as Nate Heywood/Steel. Although Maisie Richardson-Sellers appears as Amaya Jiwe/Vixen on the first Season Three poster, she wasn't listed in the initial synopsis, which some have interpreted to mean her character will return to her own era.

After the defeat of Eobard Thawne and his equally nefarious Legion of Doom, the Legends face a new threat created by their actions at the end of last season. In revisiting a moment in time that they had already participated in, they have essentially fractured the timeline and created anachronisms — a scattering of people, animals, and objects all across time! Our team must find a way to return all the anachronisms to their original timelines before the time stream falls apart. But before our Legends can jump back into action, Rip Hunter (Arthur Darvill) and his newly established Time Bureau call their methods into question. With the Time Bureau effectively the new sheriffs in town, the Legends disband — until Mick Rory (Dominic Purcell) discovers one of them in the middle of his well-deserved vacation in Aruba. Seeing this as an opportunity to continue their time travelling heroics, Sara (Caity Lotz) wastes no time in getting the Legends back together. We reunite with billionaire inventor Ray Palmer (Brandon Routh), the unconventional historian-turned-superhero Nick Heywood (Nick Zano), and Professor Martin Stein (Victor Garber) and Jefferson “Jax” Jackson (Franz Drameh), who together form the meta-human Firestorm. Once reunited, the Legends will challenge the Time Bureau’s authority over the timeline and insist that however messy their methods may be, some problems are beyond the Bureau’s capabilities. Some problems can only be fixed by Legends. Based on the characters from DC, DC’S LEGENDS OF TOMORROW is from Bonanza Productions Inc. in association with Berlanti Productions and Warner Bros. Television, with executive producers Greg Berlanti, Marc Guggenheim, Andrew Kreisberg, Phil Klemmer and Sarah Schechter.

DC’s Legends of Tomorrow returns Tuesdays at 9 p.m. ET/PT this fall on The CW.