His Hollywood films include Flame and the Flesh (1954) with Lana Turner and Pier Angeli, Valley of the Kings (1954), with Robert Taylor and Eleanor Parker, Magic Fire (1955) in which he played Franz Liszt, opposite Yvonne De Carlo, Rita Gam, and Valentina Cortese.
He was chiefly known to English speakers for his appearance as Carlos Varela in the 1963 ITC Entertainment series The Sentimental Agent.
His first success on the European book market was The Assassination of Winston Churchill (1969), a refutation of allegations by David Irving (Accident.
The Death of General Sikorski, 1967) and the German playwright Rolf Hochhuth (Soldiers, premiered in the UK in 1968, London) that war time premier Winston Churchill had a part in the death of Polish General Władysław Sikorski, who perished in an air plane crash at Gibraltar on July 4, 1943, allegedly due to sabotage.
However, once in Mexico, Felix canceled the wedding days before it would take place, stating that she concluded that the only thing that united her to Thompson was a mere physical attraction and not true love, before marrying The Rapture's leading man Jorge Negrete.