Ever since he first appeared in Season 1 of The Flash (that’d be Episode 4, “Going Rogue”), Wentworth Miller’s Leonard Snart, aka Captain Cold, quickly became a favorite with fans. Joining the crew of the Waverider on Legends of Tomorrow during the show’s first season the following year, the character slowly transformed from villain to full-blown hero who ended up sacrificing himself for his teammates at the end of the first season.
No longer a series regular, Miller has since made several guest appearances on Legends of Tomorrow thanks to some timey wimey time travel and/or appearing as an hallucination to his BFF Mick (Dominic Purcell), as well as on The Flash. Recently, Miller returned to the Waverider as Citizen Cold, the super heroic Earth-X version of Leonard Snart (call him Leo) introduced in the “Crisis on Earth-X” crossover.
Back in November, Miller announced he was filming his final episodes in the Arrowverse and while appearing at German Comic Con a couple of days ago, Miller confirmed he had one more episode to shoot this coming January, and that it would be a Flash one. Miller also revealed he would be open to return to the Arrowverse in future if the story was right.
“I’ve one more episode to shoot which I’ll do in January,” Miller said while answering a fan question. “I think it’s gonna be an episode of The Flash and that is it for me contractually."
Though his existing contract might be done, Miller said he still loves being a part of the Arrowverse and would welcome the chance to return if the writers can land on a Leonard Snart story worth telling. Considering the "Crisis On Earth-X" event just introduced an alternate version of Snart who is a good guy (and most importantly, still alive), it stands to reason there are some options out there, now.
"But I will never say never [to returning] because I do enjoy this character so much. I have a lot of affection for the cast and it’s a hard-working crew and I enjoy working in Vancouver," he said. "There are many reasons to come back; it just has to be the right story. So far I think they really did a good job of exploring all that Leonard Snart is and his various incarnations. If the powers-that-be can prove to me that there’s more story there worth telling I’ll certainly consider it.”
The Flash returns to The CW in January.