• "Legends of Tomorrow" is a spin-off series developed by Greg Berlanti, Andrew Kreisberg, Marc Guggenheim and Phil Klemmer.

"Legends of Tomorrow" is a spin-off series developed by Greg Berlanti, Andrew Kreisberg, Marc Guggenheim and Phil Klemmer. (Photo : Facebook/DC's Legends of Tomorrow)

"The Flash" actor Victor Garber is set to star in the upcoming spin-off series "Legends of Tomorrow." In a recent interview, the actor talked about the highly anticipated "The Flash" and "Arrow" crossover episode.

Garber will play Dr. Martin Stein in "Legends of Tomorrow," the same character he plays in "The Flash." "Legends of Tomorrow" will be set up by "The Flash" and "Arrow" crossover episode.

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In an interview with Variety, Garber was asked to preview "Legends of Tomorrow" particularly "The Flash" and "Arrow" crossover episode. The actor said, "I honestly have not left this lot where I am, but I know that the other characters have."

Garber said he knows it is all part of the same world and the lead-up to the premiere of "Legends of Tomorrow" even though he does not really know what happens. He added, "By the time it hits, I think people will be really excited and ready for it."

On Oct. 30, "Arrow" star Stephen Amell and "The Flash" star were spotted in Vancouver, Canada, filming new scenes on the set of "The Flash" and "Arrow" crossover episode, Just Jared reported. A day before that, Amell took to Twitter to joke that it was his last scene on "The Flash."

"My last scene on the #Flash / #Arrow crossover ended like I thought it would: With me & @grantgust spooning," Amell tweeted on Oct. 29.

Also spotted on the set of "The Flash" and "Arrow" crossover episode in Vancouver, Canada, was "The Flash" actress Ciara Renee who will play Hawkgirl in "Legends of Tomorrow."