‘The Flash,’ ‘Supergirl’ Musical Crossover Spoilers: Why Is Candice Patton Nervous About The Episode?

Candice Patton admitted that she and some of her fellow co-stars are feeling “a little bit nervous” about the much anticipated musical crossover between “The Flash” and “Supergirl.”

In an interview with Entertainment Tonight, Patton said that some members of the cast have no background in doing musicals, and that makes them worried about the episode. “We’re all super excited but also a little bit nervous,” said the 28-year-old actress, who plays Iris West on “The Flash.” “We haven’t done anything like this — maybe Grant on ‘Glee’ — but that’s it.”

Despite the jitters, Patton said that she’s “excited” to be part of it. “This is the rare show where we get to do a lot of different things as actors, and this musical episode is an example of that,” she explained. “I don’t know what my part in it will be, if it’ll be big or small, but whatever they throw at me, I’m willing to do [it].”

While Patton said that she and the rest of the cast “are all kind of just waiting for more details” about the musical, Greg Berlanti — who serves as an executive producer on both CW series — previously revealed that episode is going to feature some original songs.

“We’ll have to start talking about clearing music,” Berlanti told IndieWire last month. “I have a few ideas for tone and style in my head but we’re just starting to talk about what that can be. I do want to try and get an original piece of music written. As we make a deal on that we’ll probably make some announcements on the original songs.”

Although the villain in the musical has not been announced yet, executive producer Andrew Kreisberg said in an interview with Collider in August that the baddie of the episode “can make you think your friends are singing and dancing in front of you.”

The musical crossover is set to air sometime in spring 2017. “The Flash” Season 3 airs every Tuesday at 8 p.m. ET on The CW, while “Supergirl” Season 2 premieres on Monday, Oct. 10 on the same network.