Feline leaves town, entrusting her child Carter to Kara. An aircraft begins focusing on Lord’s organization. On the premiere night of Lord’s new projectile train, Kara and the DEO get some answers concerning two bomb dangers at the same time, one at the air terminal and one on the train.

Supergirl S02E18, Lena’s ex-boyfriend come to their city to show his big step in nano-technology which will help to erase all diseases. Lena join with Kara and the truth turn be out that they are in danger.