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

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

In the latest trailer for next week’s episode of Supergirl, longtime Superman villain the Toyman is out of jail and staging a battle against the police…and Supergirl. What’s arguably the ...