Black Kryptonite is one of the deadliest forms of Kryptonite in existence, and now it's back and worse than ever.

Supergirl has just debuted a twisted new form that officially reintroduces one of her most bizarre and wild villains to ...

The connection between Superman and Kryptonite is so firmly established in American culture that “Kryptonite” has become ...

Supergirl has fewer great villains in the Arrowverse, but there were some serious threats that caused Supergirl big problems in the series.

The Three Tense Musketeers, ahoy! Before the trip, Supergirl flies to CatCo to ask James to don the Guardian suit and confirm that Lena actually did use up her existing supply of Kryptonite.

About halfway through the pilot for Supergirl, television’s latest adaptation of a comic book property for prime-time, Winn Schott (Jeremy Jordan) designs and creates several costumes for his ...

On the other hand, kryptonite can be used against benevolent Kryptonians to take them out, and most of the characters on Supergirl wanted the last of the kryptonite on Earth to be destroyed.

Tonight, Supergirl took a page out of Smallville‘s handbook and introduced Red Kryptonite, a form of meteor rock that turns good Kryptonian boys and girls bad. Kara comes in contact with this ...

A group of criminals found “Supergirl” actress Laura Vandervoort’s kryptonite when they swiped her identity in a massive international scam, authorities said Friday. The 31-year-old actress ...

We've already seen what the green stuff can do time and time again, but now Supergirl is about to reveal what Red Kryptonite is and how it will effect our normally sweet-mannered Kara Danvers.

The CW has created an empire of superhero shows that bring big comic characters to the small screen. Supergirl is the newest to debut on the network, and it has an edge on the other three series ...

"Supergirl" introduced blue kryptonite in last week's episode, "Bizarro," so bringing in red kyptonite and having The Flash fight against Kara would actually be pretty wicked cool.