This month, the heroes of "The Flash," "Arrow" and "DC's Legends of Tomorrow" will face an unprecedented threat: an alien invasion. Desperate times call for desperate measures, and Barry Allen knows just the hero to help -- even if she's a whole universe away. For the first time since her show launched, Supergirl will make her grand entrance into the "Arrow"-verse when Barry recruits her for their cause.

Thanks to the latest issue of Entertainment Weekly, we know exactly how her introduction to the "Arrow"-verse will go down. The scene finds the various heroes -- including Green Arrow and Spartan, aka John Diggle -- assembled in STAR Labs' aeronautics facility. As Barry introduces Kara, Oliver and Diggle aren't terribly impressed. However, once she displays her power of flight, Diggle quickly changes his mind, saying, "I'm convinced."

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"I was geeking out," Candice Patton (Iris West) told the magazine. "It's so cool, especially as a girl, and a young girl who grew up looking up to those characters."

The scene posed a bit more of a challenge for Melissa Benoist, who plays Supergirl. According to the star, filming a flight scene in an airplane hanger took her out of her comfort zone. "To do it in front of all these people in a different place, I was nervous," she shared. "It took a little dialing-in to get it down."

Fans of The CW's DCTV shows won't be surprised by Digg's reaction. After all, Digg is continually impressed by Barry's speed, and he couldn't help but be incredulous as he, the Flash and ARGUS hunted down King Shark in "The Flash" Season 2. However, according to a recent video interview with Stephen Amell, Oliver will greet the Girl of Steel with the cold shoulder.

Starring Melissa Benoist as the Girl of Steel, “Supergirl” airs Mondays at 8 pm ET/PT on The CW. The network is also home to Grant Gustin as the Scarlet Speedster in “The Flash,” airing Tuesdays at 8 pm ET/PT, Stephen Amell as the Emerald Archer in “Arrow,” airing Wednesdays at 8 pm ET/PT and Arthur Darvill, Brandon Routh and Caity Lotz in “DC’s Legends of Tomorrow,” airing Thursdays at 8 pm ET/PT.