The Face of the Enemy - S4-E17
Visible crew/equipment: When Sheridan is attacked in the bar on Mars, the strobe lights at one point cast the camera's shadow against one wall behind the actors.
Babylon 5 (1994)
1 visible crew/equipment mistake in The Face of the Enemy - chronological order
Starring: Stephen Furst, Mira Furlan, Richard Biggs, Andreas Katsulas, Bill Mumy, Jerry Doyle
A Race Through Dark Places - S2-E8
Continuity mistake: Before she's succeeded in her effort to move it with telekinesis, Talia's penny reverses itself on the table between takes, changing from tails-up to heads-up.
Susan Ivanova: Vakar Ashok, our gun arrays are now fixed on your ship and will fire the instant you come into range. You will find their power quite impressive... for a few seconds.
Trivia: Walter Koenig's recurring Psi Corps character, Bester, was named in honor of science fiction writer Alfred Bester, who coined the term "psi cop" in one of his many novels about psychic manipulation.
Question: What did Susan do after she left at the end of season 4?
Answer: She was promoted to Captain and headed a new class of ship called the Warlock. Hence she was no longer on the station after season 4, dealing with her grief from Marcus dying.
Chosen answer: She was promoted to Captain and thus had to leave Babylon 5, becoming a captain on a new Warlock class ship. Later on she retires/quits and becomes the top Ranger on Minbar.