Discover how Supergirl's bizarre first kiss with Poison Ivy unveiled her immunity to synthetic Kryptonite, a power even Superman lacks.

It’s definitely the last type of Kryptonite I’d want to run into, and the entire Super Family is going to have to keep their heads on swivels to avoid it. Supergirl #3 is on sale now!

Based on the episode description, Supergirl's exposure to Red Kryptonite will make Kara turn on her friends and the citizens of National City, making her both "malicious and dangerous." ...

Now, on the one hand, it's easy to understand why Lena would want to create kryptonite and not necessarily tell her pal Supergirl about it. Earth-38 has had to deal with rogue and/or temporarily ...

Well, it depends on who you ask. In the pre- Crisis on Infinite Earths continuity, Red Kryptonite was just standard green Kryptonite, which had passed through a mysterious red cloud.

Tonight’s episode of Supergirl, titled “Falling,” will see Kara become infected with red Kryptonite. If you thought the green stuff was bad, just wait until you get a load of what this stuff ...