Guy Williams (Don Diego de la Vega / ... (82 episodes, 1957-1961)) Gene Sheldon (Bernardo (82 episodes, 1957-1961)) Henry Calvin (Sgt. Demetrio Lopez Garcia / ... (81 episodes, 1957-1961)) Don Diamond (Corp. Reyes / ... (52 episodes, 1957-1959)) George J. Lewis (Don Alejandro de la Vega / ... (49 episodes, 1957-1961))