And I guess I was wrong the other week when I thought I heard Rachel address Leekie as "Dad."
I meant to comment on that actually. When I watched that episode for the second time I paid close attention, and she does in fact call him 'Aldous.' Though someone who's not listening closely it could sound like father.
No, that's not what I'm referring to. I did hear her call him Aldous during that conversation, but there was also a point, while she was adjusting Leekie's bow tie, when she said something that I heard as "Dad." Since she used both forms of address (or so I thought), I wondered if maybe the "Dad" was a slip of the tongue on the character's part. But now it seems that I misheard.
Apologies, but that was the moment I meant, because when I first watched it I too thought she said "Dad." I realize I said father in the post you quoted and that was my bad. She clearly calls him Aldous though.