Theory about Darlene's whisper to Elliot
I went to Reddit to see if anyone knew what Darlene whispered to Elliot when she picked him up from prison and hugged him.
There wasn't a definitive answer, but a theory that I liked was presented: that what she whispered were sort of "code words" to trigger Elliot, to bring out Mr. Robot. A sort of "Would you kindly ..."