Cassen was born on 28 October 1928 in Tarragona, Tarragona, Catalonia, Spain. He was an actor and writer, known for 07 con el 2 delante (Agente: Jaime Bonet) (1966), Plácido (1961) and De professió: A.P.I. (1988). He was married to Mary Carmen Crespo. He died on 4 August 1991 in Barcelona, Barcelona, Catalonia, Spain.