DC's Legends of Tomorrow showrunner Marc Guggenheim has revealed the door will be left open for Wentworth Miller following his onscreen exit.

The Prison Break actor plays Leonard Snart/Citizen Cold in the series but will bow out during tonight's episode (Monday 12) after it was revealed he would be dropping out of the DC TV-sphere in November.

However, it looks like Miller may indeed return as Snart in a future series, as Guggenheim says he won't actually die in tonight's much-anticipated premiere episode.

Diyah Pera The CW

"Leo never says I'm staying with the team permanently,'" Guggenheim told Entertainment Weekly.

"He has said, 'I'm gonna stay until they get over their death, until they mourn the death of Stein.' And you see that happen and Leo leaves with— he has a really good reason to leave. And he's leaving for a very, I think, positive reason. And he leaves with, I'd say, a really good piece of advice for Sara."

Guggenheim then clarified, "He is not dying."

The CW

Tonight's episode of Legends of Tomorrow marks the series' big return after a long hiatus.

To celebrate, legendary DC character John Constantine will be joining the cast. He'll be portrayed by Welsh actor Matt Ryan, who has previously donned the role in the 2014 Constantine TV series and Legends of Tomorrow sister series Arrow.

Legends of Tomorrow returns tonight (February 12) on The CW in the US.

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