4.On Supergirl, during "Crisis on Infinite Earths: Part One," Oliver heartbreakingly died after sacrificing himself to save billions of innocent people on Earth-38 before it was destroyed.
5.On Batwoman, during "Crisis on Infinite Earths: Part Two," we visited Earth-167 and got to see what Smallville's Clark and Lois have been up to since the series ended in 2011.
6.Also on Batwoman, Lois, Clark, and Iris visited Metropolis on Earth-96 to convince that version of Clark to return with them and help save the multiverse as a Paragon of Truth.
7.On The Flash, during "Crisis on Infinite Earths: Part Three," Mia, Diggle, and Constantine visited Lucifer from Lucifer on Earth-666 in order to get into purgatory and bring back Oliver's soul.
8.Also on The Flash, The Flash from Earth-90 sacrificed himself to save Barry from disappearing during "Crisis on Infinite Earths."
9.And "Crisis on Infinite Earths: Part Three" ended with Supergirl, The Flash, Sara, Batwoman, J'onn J'onzz, Ryan Choi, and Lex Luthor being transported to the Vanishing Point while everyone else disappeared.