The team is tasked to recover one of three receipts for Picasso's 1939 painting, "Guernica". If they don't succeed, the painting will not return to Spain in 1981. But while in the past, Julián discovers an ugly truth about his father.
Episode title: "Good old times"
Julián Martínez:
You like it or what?
Amelia Folch:
Yes, if only the music was lower.
Julián Martínez:
Rock can't be played low!
Amelia Folch:
What is rock?
Julián Martínez:
Mankind's most wonderful invention, along with beer and patatas bravas.
When Alonso knocks out Paul Walcott at the airport, Walcott's clothes reveal part of his abdomen. As Alonso and Ernesto place him on a stretcher, the "unconscious" Walcott slightly arranges his shirt.