Zorro - Season 2 - Eps 12: Zorro Fights a Duel
Diego doesn't know that Ricardo has developed a hatred for Zorro. He makes matters worse when he substitutes a block of wood for a box of chocolates intended for Anna Maria. When she opens her present and Ricardo sees the wood, complete with a carved "Z", he decides to kill his unmask his foe.
About Zorro

Title: Zorro
First Air Date: 1957-10-10
Last Air Date: 1959-07-02
Status: Ended
Rating: 7.5/10 (from 169 votes)
Language: EN
Seasons: 3
Total Episodes: 78
Network: ABC
Genres: Western, Action & Adventure, Drama, Comedy, Family
Production Companies: Walt Disney Productions
Synopsis
Diego de la Vega, the son of a wealthy landowner, returns from his studies in Spain and discovers that Los Angeles is under the command of Capitan Monastario, a cruel man who relishes in the misuse of his power for personal gain. Knowing that he cannot hope to single-handedly defeat Monastario and his troops, Diego resorts to subterfuge. He adopts the secret identity of Zorro, a sinister figure dressed in black, and rides to fight Monastario's injustice.
Cast

Guy Williams
Don Diego de la Vega / Zorro

Gene Sheldon
Bernardo

Henry Calvin
Demetrio López García