After talking to the senator, Mollari grabs his lower abdomen and says "touch this". Considering what we find out about Centauri reproduction in this and later episodes, this is the Centauri equivalent of grabbing his crotch. (edit) First apperance of Damian London as the Centauri Senator. He later goes on to become Regent and Emperor. (edit) Bill Mumy and June Lockhart both starred in Lost in Space. They pleaded with the staff to let their characters have one scene together, where they look at each other like they recognize each other. But the producers wouldn't allow it. (edit)

Dr. Franklin: Next! You can start by removing your clothes.
Ivanova: Not without dinner and flowers. (edit) Sinclair: I'm still waiting for an explanation, gentlemen.
Londo: Yes and I am prepared to give you one, Commander ... as soon as this ROOM stops spinning.
Sinclair: This station creates gravity by rotation, it never stops spinning.
Londo: Now you begin to see my problem, hmmm. (edit)

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Portia in Act IV Scene I of the Merchant of Venice speaks the famous quote, "The quality of mercy is not strain'd,/It droppeth as the gentle rain from heaven/ upon the place beneath..." (line 180-183)Which, is the origin of the title of this episode. (edit)