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One of our favorite comic book aliens, Supergirl, is headed to Mars tonight (Oct. 23) and it looks like a Mars rover will make a quick cameo. 

In the trailer for tonight's episode "Far from the Tree," Supergirl heads to Mars with J'onn J'onzz, the Martian Manhunter, on a personal mission to the Red Planet. As their spaceship streaks over Mars, a curious rover appears for a brief moment. While the rover looks curiously similiar to NASA's Curiosity rover, it does have one glaring difference: an American flag waving from a mast. 

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A spaceship streaks over Mars, with a U.S. rover clearly in view, in this still from a trailer for the "Supergirl" episode "Far from the Tree" airing Oct. 23, 2017.
A spaceship streaks over Mars, with a U.S. rover clearly in view, in this still from a trailer for the "Supergirl" episode "Far from the Tree" airing Oct. 23, 2017.
Credit: CW/Warner Bros.

There IS an American flag on the Curiosity rover (a flag medallion on one of the rover's four mobility rocker arms) but not the sort seen in the Supergirl trailer. But authenticity aside, Supergirl is headed to MARS! 

"Far from the Tree," the third episode of Supergirl's third season, airs tonight on CW at 8 p.m./7 Central. 

Email Tariq Malik at tmalik@space.com or follow him @tariqjmalik. Follow us @Spacedotcom, Facebook and Google+. Original article on Space.com.