Delenn's old friend is a poet, and Delenn recognizes a poem she wrote many years ago. At the end of Babylon 5: The Gathering (1993), Sinclair quotes the poet Tennyson-- and Delenn does not know what a poet is.
Garibaldi reacts to the Commander's tracking signal being jammed a split second before it actually cuts out.
After Cmdr. Sinclair contacts LCDR Ivonova about the latest attack, the next scene shows Sinclair, but the image is backwards.
When Malcolm Biggs is preparing to leave Ivanova's quarters, the door opens without any interaction, verbal or physical, from Ivanova or Biggs.