-The European mountains scene was actually shot in upstate New York.
Gillian Alexy was cast as Charlotte several weeks prior to this episode being shot, since most of the flashback scenes needed to be filmed while the crew was shooting in France (during episode 604).
Gillian Alexy had to wear specially made milky-colored contact lenses, and a blind consultant was on set to help advise her actions to help properly portray her disability.
The hotel bathtub scene was shot in the middle of the hospital set!
Several different (and bigger!) boats were considered to stand-in for Cinco’s birthday present, from speed boats to huge yachts. The final selection was based on what type of boat could be driven directly up to the dock.