Jeffrey Sinclair's five o'clock shadow is real, not makeup. At the time of shooting, Michael O'Hare had just returned from New York City where he'd been appearing in a Broadway play. Babylon 5 producer, J. Michael Straczynski, told O'Hare not to shave, as the whiskers added to his character's haggard look.
The scenery behind Senator Hidoshi in the video call is actually a view over Zurich, Switzerland.
The authors have confirmed that the Rush Act was named after radio personality Rush Limbaugh, due to his hard-line attitude and refusal to negotiate.
This takes place in May 2258.