Lois learns that Clark has been working undercover to reveal the assassins. It’s obvious that she really likes him; maybe because he’s no longer going out of his way to appear cowardly.
His response to her – and his willingness to be seen as heroic in his Clark persona – could be evidence that he likes her too and no longer wants to push her away. Interesting character development and it’ll be even more interesting to see how the new dynamic affects their working relationship.
[From a November 1939 Superman newspaper strip by Jerry Siegel and Joe Shuster.]