Title translation: Who proved it, knows it.
When Javier is asking Jaime about his harassment to Sofía, he remembers that Javier had also a relationship with a resident: "She was called Laura, wasn't she", he asks.
Nancy Yao would appear in some episodes of season 20 performing a different role. In both cases, the actress shared most of her scenes with Pablo Carbonell.
Although Mónica doesn't appear, Teresa reads a good bye letter that the nurse has written for her partners. In that moment, her best moments in the series are shown while the song "Por ti" (Taxi) sounds as background.