The production was running a little behind when filming of the Centauri religious ceremony. To help speed things up Peter Jurasik improvised many of his lines and actions, including climbing on the table and the line "...in purple I am stunning!" Mira Furlan was not told what was happening and her reaction is natural (and rather fitting for the character). This was unusual for B5 as improvisation was not usually allowed due to the ongoing storyline.
During the Minbari ceremony after ambassador G'Kar is given the piece of red food, the camera changes to Delenn. In the background you can see G'Kar quickly exchange his piece of red food with Ivanova's.
The actors played a prank on Michael O'Hare as he showed up to display Earth's dominant religion. When he told them to follow him, everyone turned and walked in the opposite direction.
Julie Caitlin Brown asked to do as much of her own stunt work as she could. As a consequence, during the scene in which she "attacks" G'Kar, she accidentally threw a hard kick directly into one of the cameras.
After Delenn meets Lennier at customs, and the two are walking out of the shot, Delenn says, "Now tell me of home; I have been away far too long." In each take, actor Bill Mumy ad-libbed a different line in response, including, "Beatlemania is back," and, "Well, we just got Pizza Hut and cable." Naturally, none of these lines were included in the final cut.