The latest updates and spoilers for "Legends of Tomorrow" Season 4 reveal that one cast member will be saying goodbye to the hit DC TV series. TV Line reported that cast member Keiynan Lonsdale will no longer be included in the show, but it does not mean that it will be the last time the audience sees him as Wally West a.k.a. Kid Flash in the "Arrowverse."

Lonsdale's character joins the Legends during the events of season 3 as the team tries to stop Damien Darhk and her daughter, Nora from releasing the time demon, Mallus from his prison using the Zambezi totems and the time anachronisms that disrupts the world's history.

The reason why Kid Flash leaves 'Legends of Tomorrow'

Keiynan Lonsdale posted a tweet on his official Twitter page his reason why he will not return in the third season of "Legends of Tomorrow." The Kid Flash actor explained in his lengthy post that he simply has changed as an actor and wants to improve his career outside of the "Arrowverse" TV Shows.

While DC comic book fans are disappointed that Wally West will no longer be featured in the DC TV series, Lonsdale added that this will not be "a total goodbye or a 'see you never'" type of scenario as he will likely reprise his role on guest episodes.

For now, the "Insurgent" movie actor will be appearing in the premiere episode of "The Flash" in its fifth season.

Wally West made his live-action debut in the second season of "The Flash" as Joe West's long-lost son and Iris's younger brother from Keystone City. Wally became a speedster after being in contact with Savitar and adopted the codename Kid Flash to help Barry Allen defend Central City from metahuman threats.

Kid Flash left Team Flash in the fourth season as he felt out of place among his peers and decides to go on a soul-searching trip. Wally was then recruited by Rip Hunter to return with him to the Legends to stop the Darhks from releasing the time demon, Mallus from destroying time and space.

What 'Legend's Season 4 is all about

According to the CW Network (via Screenrant), the plot for the fourth season of "Legends of Tomorrow" reveal the time-traveling heroes facing magical threats called "Fugitives" after they were informed by John Constantine of their mistake during their final battle with Mallus.

The barrier between the worlds has been softened as the Fugitives wreck havoc across history. The Legends and Time Bureau must work together with John Constantine to stop them as he has the knowledge and skill to capture or even kill these mythical creatures.