¿Y tú quién eres?

Antonio Mercero Juldain (Lasarte-Oria, Guipúzcoa, March 7, 1936 - Madrid, May 12, 2018) was a Spanish film and television director and screenwriter, best known for his series Verano azul, Farmacia de guardia and Crónicas de un pueblo, and for his award-winning telefilm La cabina.