Answer:
"estrenado" means "premiered" or "released".
Step-by-step explanation:
Based on the above definition, you could use it in a sentence stating that "The last episode of series five of BBC's Merlin was released on December 24th, 2012." In Spanish, this would be "El último episodio de la serie cinco de la BBC Merlin fue estrenado el veinticuatro de diciembre de 2012."