Continuity mistake: The ship that's supposed to transport Londo Mollari home changes ship class. Before the explosion, it's a Primus class battle cruiser. The wreckage shown afterwards is of a Vorchan class medium warship.
Babylon 5 (1994)
1 continuity mistake in Strange Relations
Starring: Stephen Furst, Mira Furlan, Richard Biggs, Andreas Katsulas, Bill Mumy, Jerry Doyle
Revealing mistake: When he's attacked in Down Below, Dr. Franklin is shoved against a station bulkhead/wall that wobbles when he hits it. (00:15:30)
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.
More trivia for Babylon 5
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.