Continuity: When Aldous Gajic meets with Delenn and Lennier, Lennier says that there are two castes of Minbari, religious and warrior. This is in deep conflict with the rest of the series, in which it is often established that there are three castes, not two.
Sinclair: You need to find another witness.
Garibaldi: When the word gets out about Miriam, I've got as much chance of doing that as seeing a Vorlon doing strip-tease.
Garibaldi: You think he's genuine.
Sinclair: Aldous? Yes. Question is: a genuine what? One man's lunatic is another's true seeker.
Garibaldi: You have been hanging around Delenn too much.
Londo: Vir! What are you doing?
Vir: Why, I'm being efficient, sir.
Londo: A few more like you, Vir, and the entire Centauri Republic will efficient itself to extinction.
Londo: Fools to the left of me, feeders to the right. I need to find a real job.
Sinclair: Deuce wanted the people to think that he had the Vorlons working for him. Figured it would add to his image and intimidate people.
Sinclair: Well, after all, no one knows exactly what you look like. That makes some people...a little nervous.
Garibaldi: No boom?
Sinclair: No boom.
Ivanova: No boom today. Boom tomorrow. There's always a boom tomorrow. What? Look, somebody's got to have some damn perspective around here. Boom, sooner or later. Boom.
Sinclair: They say food digests better if you chew it first.
Garibaldi: Don't talk - I've seen you eat. Does the term Doppler-effect ring a bell?
The episode contains the first totally CGI alien, the Na'ka'leen feeder.
Several B5 production crew have played roles in Babylon 5. In "Grail," the Director of Photography, John C. Flinn III, plays "Mr. Finn." He will later appear in the episode "Convictions" as the "Obnoxious Man."
Writer Christy Marx named the character Aldous Gajic after Mira Furlan's husband whose last name is Gajic. Mira Furlan plays the Minbari Ambasador Delenn.
The writer of this episode is Christy Marx who is also known for authoring several games and comics.
Originally, Vorlon Ambassador Kosh was to deal with the Na'ka'leen feeder. The scene was changed because it did not seem to fit the Kosh character and was similar to the ending of the episode "Deathwalker".
The Grey-alien trial scene was the only part of Christy Marx's script that was not written by Christy Marx. According to producer J. Michael Straczynski "I dropped it into Christy's script because it was something I always wanted to do. I just figured, okay, if these things really ARE happening, and it gets found out, and we make contact with aliens, and find the ones responsible... somebody's gonna want to sue their butts off. So it became a very logical extension of the judicial system... And...well, it was a hoot. I'll forgive much if it's a hoot." He adds "The human won the case, but damages awarded were minimal."
According to J. Michael Straczynski the feeder was let out by "Stupid bureaucrats who couldn't afford to maintain a quarantine enforcement team in the sector".
J. Michael Straczynski has said the following about the score and composer Chris Franke: "After 'Grail,' we had a discussion with Chris about funny music. We do not anticipate further discussions. In a full season of music for B5, this is the only discussion we've had of a critical nature, which is extraordinary for any series; he's done a lot of wonderful work for us..."
Ship Name: Von Braun
This ship is named after Werner Von Braun, the father of the American space program.
Londo: Fools to the left of me, Feeders to the right.
This is a play on the third stanza of the poem Charge Of The Light Brigade, by Alfred Lord Tennyson:
"Cannon to the right of them,
Cannon to the left of them,
Cannon in front of them
Volley'd and thunder'd."
OR it could be an allusion to the 70's song, "Clowns to the left of me, jokers to the right."
The Doppler Effect, named after Christian Andreas Doppler, is the apparent change in frequency or wavelength of a wave that is perceived by an observer moving relative to the source of the waves. A sound wave's pitch sounds higher as the sound source approaches and lower as the sound source recededes from the observer.
Ship Name: Marie Celeste
At the end of the episode Jinxo who survived the loss of the four earlier Babylon station boards a transport named Marie Celeste. This is a reference to a sailing ship found adrift in 1872 by the crew of the ship Dei Gratia. The crew of the Marie Celeste and a single lifeboat were missing, but half-eaten meals were in the mess hall. Captain Morehouse of the Dei Gratia had dined with Captain Briggs of the Marie Celeste the night before departure. Captain Morehouse and his crew were tried for murder, but acquitted. The missing crewmen were never found.