Writer:	J. Michael Straczynski
Director:	Janet Greek
Star:	Stephen Furst (Vir Cotto),  Claudia Christian (Susan Ivanova),  Jerry Doyle (Michael Garibaldi),  Andreas Katsulas (G'Kar),  Bill Mumy (Lennier),  Richard Biggs (Dr. Stephen Franklin),  Andrea Thompson (Talia Winters),  Peter Jurasik (Londo Mollari),  Mira Furlan (Delenn),  Michael O'Hare (Jeffrey Sinclair),  Julie Caitlin Brown (Na'Toth)
Recurring Role:	Louis Turenne (Draal),  Marianne Robertson (Tech #1)
Guest Star:	Curt Lowens (Varn),  Craig Barnett (Security Guard),  Langdon Bensing (Derek Mobotabwe),  Kelly Coyle (Earthforce Liaison),  Kat Cressida (Bartender),  Jim Ishida (Dr. Tasaki),  Lenore Kasdorf (ISN Reporter),  Patty Toy (PSI Corps Rep),  Jerry Weil (Technician)

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Londo: Now, I go to spread happiness to the rest of the station. It is a terrible responsibility but I have learned to live with it. (edit) Ivanova: Commander, I think I have to go to the bathroom.
Sinclair: Tell me about it. (edit) Survey 1: Returning to base
Ivanova: Confirmed Survey 1. Upon arrival you WILL report for debriefing ... And just one more thing. On your trip back I'd like you to take the time to learn the Babylon 5 mantra. "Ivanova is always right. I will listen to Ivanova. I will not ignore Ivanova's recommendations. Ivanova is God." And if this ever happens again, Ivanova will PERSONALLY RIP YOUR LUNGS OUT! Babylon Control out.
[gives crew a look] Civilians. [looks up] Just kidding about that God part. No offense. (edit)

It would be extremely unwise if not even forbidden for the commanding officer and his second-in command to undertake a possibly hazardous mission that could lead to both their deaths. If one of them wanted to go the other should have stayed on the station. (edit) Dr. Tasaki can not seem to make up his mind whether to use miles or kilometers. (edit) On their descent into the planet, Ivanova is calling out depth readings. However, the screen in front of her shows a constant depth and a much slower velocity than she is giving. (edit)

The reveal of the vast interior of the planet is a reference to the movie Forbidden Planet, which concerns a planet containing a massive machine and has a similar shot revealing its vast scale. (edit)