'Arrow' Season 4 Spoilers: John Barrowman Teases The Return Of Sara Lance, Constantine Crossover

It’s shaping up to be a big week for “Arrow” on the CW as Season 4 continues to push the envelope and set things up for the series’ spinoff “DC’s Legends of Tomorrow.” With a dearly departed character poised to make a rather eerie return from the grave, actor John Barrowman is sharing some details about what will happen next.

Fans may recognize Barrowman as Malcolm Merlyn, the evil dark archer that’s acted as both friend and foe to Oliver Queen (Stephen Amell) during his time fighting crime in Star(ling) City. Merlyn will make his triumphant return to the screen in Season 4, episode 3 when a handful of characters return to the League of Assassins.

As previously reported, the latest episode of “Arrow” will begin a storyline that sees Sara Lance (Caity Lotz) return to life after Malcolm hatched a plot to murder the superhero in Season 3. Fans know that, whatever happens, Sara’s body will be put in the Lazarus Pit and she’ll come back to life as the White Canary in the upcoming 2016 series “Legends of Tomorrow.” Last week’s episode of “Arrow” saw Laurel Lance (Katie Cassidy) and Thea Queen (Willa Holland) agree to bring Sara’s remains to Merlyn in the hopes he’d resurrect her with the Pit like he did Thea. However, Thea was only dead for a minute, and Sara has been gone the better part of two years, which Barrowman teases won’t be an insignificant difference.

“Yeah, that’s a little bit more of a ‘risk,’ shall we say,” the former “Torchwood” actor told TV Line. “Malcolm has said before that when somebody goes into the Pit, a piece of everybody’s soul who has been in there prior goes into that person. Well, Sara’s going to need a lot more than just a piece of everyone’s soul. It’s going to need to fill her a lot more than it did Thea, so Malcolm is very intrigued by how she might come out. But would he want her to come back when he got rid of her in the first place?”

Fortunately for the soon-to-be resurrected Sara Lance and the newly returned Thea Queen, there might be hope for their ability to bounce back to normal from their post-death symptoms. According to Deadline, “Arrow” will soon play home to Matt Ryan, reprising his role as Constantine from the canceled NBC drama of the same name. Both shows were based on DC Comics characters, which are owned by Warner Bros. As a result, the multi-network crossover is possible and Constantine will make his way to “Arrow” in episode 5. While Barrowman is teasing dire consequences for the return of both women from the dead, Constantine might be able to help them given that entities from beyond the grave are kind of his bread and butter.

Fans can tune in to “Arrow” at 8 p.m. EDT on the CW on Wednesdays to see how it all plays out for Sara Lance ahead of “Legends of Tomorrow.”