THE LONE DEFENDER Mascot 1930 / 12 Chapters / Mystery Villain/Animal Western
Featuring Walter Miller as Ramon
June Marlowe as Delores Valdez
Mystery Villain: The Cactus Kid MacGuffin: A secret mine Supporting Cast: Buzz Barton, Lafe McKee, Josef Swickard, Lee Shumway, Julia Bejarano, Frank Lanning, Robert Kortman, Arthur Morrison, Victor Metzetti, Otto Metzetti
Directed by: Richard Thorpe
Plot: The owner of a secret mine is murdered and Rin-Tin-Tin is a witness. The Cactus Kid and his gang think the dog can lead him to the mine. Rinty and helpful stranger Ramon try to beat the gang, protect the murdered man's daughter Delores, and uncover the identity of the Cactus Kid.
Notes: One of the very few serials to utilize an onscreen narrator. The Lone Defender was the first sound serial to receive national distribution.
Chapter Titles: 1: Mystery of the Desert 2: The Fugitive 3: Jaws of Peril 4: Trapped 5: Circle of Death 6: Surrounded by the Law 7: The Ghost Speaks 8: Brink of Destruction 9: The Avalanche 10: Fury of the Desert 11: Cornered 12: Vindicated