Although he is credited as a guest star, Jeff Griggs (Dan Randall) only appears in archive footage taken from The Illusion of Truth (1997).
This takes place from May 11 to May 13, 2261.
Marcus mentions that he is a ranger. Marjorie Monaghan, who plays Number One, previously starred in Space Rangers (1993), another sci-fi series.
When Sheridan goes to apologise to Garibaldi, and an alien woman starts praising John, Michael gets upset and says "he's (Sheridan) not the Pope - he doesn't look anything like her". It's up to the viewer to consider if a) religion survives to the 23rd century, and b) if so, a remoter chance that the Catholic Church would progress to allowing a woman as a the Holy See.