Supergirl finally learns the truth about Lena while tangling with Leviathan; J'onn J'onnz makes a discovery about his brother's whereabouts.
Did You Know?
As Brainiac was describing his thought processes on how he deduced where Leviathan would be headquartered, he pointed out the symbol which he said was on "this building's cornerstone". That wasn't a cornerstone. It was a pillar. A cornerstone is the first stone laid in a masonry building to make sure it's square and stable. A pillar is a support for an overarching structure. See more
[after the Fortress identifies Lena as an intruder
Sorry. I... I had no idea Superman would... would take such extreme measures.
No, if Lex knew about this place, he would do anything or kill anyone to get in here, so...
Well, you are not Lex.
And you are not your cousin. We are miles beyond those boys with their sticks and their stones.
Yes, we are.