This is the episode number 200 of the series.
María Casal, Sergi Mateu, Ángel Pardo, Armando del Río and Marco de Paula, all actors that had left the series, collaborated in this episode.
The part that is played by Teresa Lozano as Esther's aunt was modified because it had been written for the actress Carmen Rossi, who had played before Esther's mother Encarna and who died some days before the filming.
Adriana Ugarte plays Claudia's niece. He had played another character in the series in 2002 and she would play a different third in 2011, Natalia, in this case during five episodes.
Title translation: Things that we forgot to tell.