An Earthforce Special Intelligence investigator comes to B5 with Lt. Keffer's last recording, asking the ambassadors if they recognize the ship in it. Meanwhile, Londo takes steps to remove himself from the Shadows, and Sheridan is presented with a new weapon with which to fight the growing Shadow threat.

The new Centauri appointed Narn government send a replacement for G'Kar, who has to decide whether to return to Narn as demanded by the Centauri, or remain on Babylon 5. Meanwhile, an alien probe threatens to destroy the station unless it gets the answers to a series of complicated scientific questions.