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Last night's episode of Supergirl happened to feature a cool DC Easter Egg as a Legion Flight Ring was featured.

Now where did we see that before?

We saw the Legion Flight Ring on The Flash a couple episodes ago when Barry went through the portal to Earth-2, which also happened to feature Supergirl.

Coincidence?

Nope. We see the rings and images are exactly the same from both episodes (see below).

The Flash is scheduled to crossover on Supergirl on Monday, March 28th with the episode titled "Worlds Finest."

"Supergirl" airs Mondays on CBS at 8pm ET; "The Flash" airs Tuesdays at 8pm ET on the CW.

Supergirl:

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The Flash:

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