(at around 41 mins) When Mauricio is in the hospital, an announcement is heard over the loudspeaker asking Dr. Julián Sastre to go to Psychiatry. Julián Sastre is one of the producers of the series.
(at around 12 mins) While Mauricio is in the hospital deciding whether to hook up with Rosa, an announcement is heard over the loudspeaker demanding that Nurse Artigas come to the maternity ward. Mónica Artigas is one of the regular realizators of the series.