The fourth season of the American television series Legends of Tomorrow, which is based on characters from DC Comics, premiered on The CW on October 22, 2018, and concluded on May 20, 2019, with a total of 16 episodes.

[1] The season follows the Legends, a dysfunctional team of time-traveling superheroes and anti-heroes, and their mission to recapture the magical fugitives that they accidentally released throughout time.

The season was produced by Berlanti Productions, Warner Bros. Television, and DC Entertainment, with Phil Klemmer and Keto Shimizu serving as showrunners.

Principal cast members Brandon Routh, Caity Lotz, Maisie Richardson-Sellers, Tala Ashe, Amy Louise Pemberton, Nick Zano, and Dominic Purcell return from previous seasons, while Jes Macallan, Matt Ryan and Courtney Ford were promoted to the principal cast from their recurring statuses in season three.

[3] At the Television Critics Association winter press tour in January 2018, The CW president Mark Pedowitz said he was "optimistic" and "confident" about Arrow and the other Arrowverse shows returning next season, but added that it was too soon to announce anything just yet.

[57] Main cast members Brandon Routh, Caity Lotz, Amy Louise Pemberton, Dominic Purcell, Nick Zano, and Tala Ashe return from previous seasons as Ray Palmer / Atom, Sara Lance / White Canary, Gideon, Mick Rory / Heat Wave, Nate Heywood / Steel, and Zari Tomaz, respectively.

The single was performed by actors Tala Ashe, Sachin Bhatt, Ramona Young, Brandon Routh, Courtney Ford, Caity Lotz, and Maisie Richardson-Sellers.

The ad jokingly claimed that Arrow, The Flash, and Supergirl were trying to keep attention away from Legends of Tomorrow, followed by many headlines as well as real and fake quotes praising the series.