During the scene where Baltar looks at the hundreds of vials and talks to Number Six about how hopeless it is, the music playing in the background is "Battlestar Operatica," which was written for the episode by Bear McCreary rather than using Mozart.
The lyrics are in Italian and mean the following:
Woe upon your Cylon heart
There's a toaster in your head
And it wears high heels
Number Six calls to you
The Cylon Detector beckons
Your girlfriend is a toaster
Woe upon your Cylon heart
Alas, disgrace! Alas, sadness and
misery!
The toaster has a pretty red dress
Red like its glowing spine
Number Six whispers
By Your Command
Apollo: Why did you bring her here?
Adama: Because she's his wife! I couldn't deny her access to her own husband without causing suspicion. Besides, I wanted her close to me.
Ellen Tigh: (walks in with Col. Tigh) I told you! I told you he wanted me!
Baltar: Oh lovely.
The title of this episode refers to the 1990 Pedro Almodovar movie ¡Átame!. It was released in the U.S. under the title "Tie Me Up! Tie Me Down!" It helped spur the MPAA to create the NC-17 rating because of its extensive nudity and graphic sex scenes.
The plot of the BSG episode does not follow that of the movie, which involved a kidnapping.
"Delphi" was home to the Delphic Oracle of Apollo in ancient Greece. Helo discovers that the Cylons have been using the city of Delphi as the base of their operations on Caprica.