[S5E12] Leave The Choice To Solomon
He debates his next move with Tom's bare skull before smashing it, wondering aloud whether he should write Kristen a note in Tom's name to explain Tom's sudden disappearance. He types one out and plays dumb when he finds Kristen reading it. Exasperated, Kristen questions her choice in men and Ed tells her to read between the lines. After she leaves, chuckling to himself a little, Nygma repositions the note, revealing that the first letters of each line spell "NYGMA" down the left margin.
[S5E12] Leave the Choice to Solomon