Pablo Iglesias handed over the box set while shaking hands with the king in a hotly anticipated meeting in Brussels on Wednesday, April 15th.
"I dodged protocol to bring you a gift," Iglesias told King Felipe, shaking the monarch’s hand.
King Felipe is in the Belgian capital to meet with President of the European Parliament Martin Schulz, as well as make his first visit to the European parliament and greet the 54 Spanish MEPs.
"It looks very good," the king replied, according to Spanish broadcaster RTVE, confessing to Iglesias that he had never watched the series.
Iglesias is a die-hard fan of the US television series. Its eagerly anticipated fifth series, which was partly filmed in southern Spain, began last week.
After meeting with King Felipe and posing with his fellow MEPs for a group photo with the monarch, Iglesias told the press:
"I told him that he is sure to like the series and that it will give him some keys for understanding the political crisis in Spain."
Iglesias, a pony-tailed former professor of political science, is the leader of Podemos, a left-wing party that has risen to prominence on the Spanish political scene since its conception, barely a year ago."
The meeting might have been a bit awkward as Podemos has done little to disguise its Republican tendancies. Many of its supporters turn up to its political rallys waving the tricolour flag of Spain's Second Republic, a democratically elected government that came to end with the military coup by Francisco Franco and subsequent Civil War.
Iglesias himself has in the past stated that the party would hold a referendum on the monarchy if it came to power.