Jordi Boixaderas

Self - Narrator (voice)

José María Madiedo

Self - Astrophysic

Ana Pires

Self - INESCTEC/ISEP Researcher

Ignacio Horcada

Self - Spanish Navy Vice Admiral

Bruno Gonçalves Neves

Self - Portuguese Navy Lieutenant

Guadalupe Fernández

Self - Historian

Pablo Emilio Pérez-Mallaína

Self - Historian

Silvestre de Almeida Lacerda

Self - Historian

José Marques

Self - V Centenary Commission President

Xabier Alberdi

Self - Historian

María Antonia Colomar Albajar

Self - Historian

Tomás Mazón

Self - Researcher

Yuri Gagarin

Self - Cosmonaut (archive footage)

John F. Kennedy

Self - Politician (archive footage)

Manuel H. Martín