In early 2017, The Flash and Supergirl will team up for a musical episode -- and The Flash's executive producers won't say no to the idea of adding a dance sequence to their half.

"[I]f we can get a dance sequence in there on top of it, I would love to do that. Listening to Joe as the lounge singer, singing, and to see Grant and he was karaoke-ing first season, and even watching Danielle, not being able to sing ... I'm just really excited, to be honest, to see how it all comes together," showrunner Todd Helbing told IGN. "I know Greg [Berlanti] is very close to this story. He's been thinking about it -- I don't know how long, probably not just yesterday, you know what I'm saying? He's been percolating. Seeing Jesse sing, seeing Grant sing, it's just one of those -- like whoa, we can totally pull this off. I don't know why we wouldn't do this. Let's go for it. This year in general we're really swinging for the fences."

They're doing so with some major villain additions, including Mirror Master and Dr. Alchemy -- as well as with big casting like Harry Potter standout Tom Felton as Barry's rival at work. And, yes, they're doing it with not one but two big crossover events: besides the musical, set to take place in the thirteenth episode of the two series, The Flash will be part of a four-part, four-show crossover in December 2016 with Supergirl, Arrow, and DC's Legends of Tomorrow.

The Flash Season 3 premieres Tuesday, October 4 at 8 p.m. ET/PT on The CW. Supergirl premieres on Monday, October 10 at 8 p.m. ET/PT on The CW.

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