José Luis Gómez

as President of the Institute of Biotechnology

as Ernesto Martel

as Tomás Bilbatúa

as Humberto Suárez

as Producer

as Leandro

as Emilio

as Polidori

as Ugarte/Valdivia

as Fray Pedro de Alcántara

as Pascual Duarte

as Miguel

as Silvio

as Luis

as Manuel Junco

as Dalmau

as Motorista

as Bocas

as Juan Oribe

as Escalante

as Corsario

as Antonio

as Julio Montero

as Diego de Velazquez

as Unamuno

as Doctor Monasterrio

as Simón

as Narrator (uncredited)

as Don Julián

as Voz del poeta

as Pablo Picasso

as Luis