A former aviator who has become a tramp, Bud attaches himself to John Marshall's hidden mountain refuge. He is part of the small group gathered at the hiding place, alongside Mary Marshall and Miguel Cordero, when Terrence O'Rourke arrives after losing control of his airplane.
Dick Stanton is a border patrol aviator who becomes the chief active protector in the story. He rescues James Crandall's daughter, investigates the theft of James's first-entry papers, brings aid for Nick Crandall, and pursues Joe Calvert during the aerial abduction and final battle.
Al Parker is a mining engineer who is secretly the government agent known as the Air Hawk, sent to investigate the thefts from the platinum mine. He helps uncover the mystery, pursues Robert McLeod when Edith is abducted, and rescues her. He is in love with Edith and is happily reunited with her at the end.
Sky-High searches for his twin brother, Michael, whom his family believes died in combat. He uncovers an aircraft-smuggling gang, saves Helen from Delatour, and later disguises himself as Michael to destroy the gang's mountain stronghold. Michael dies in Sky-High's arms after Sky-High shoots down his aircraft.
Al Simpkins is an ambitious aviator who invents Economo, a fuel claimed to let a plane fly 1000 miles on a pint. He rescues his sweetheart Stella Hearns from a runaway car, pursues Silas Smythe after the fuel formula is stolen, retrieves it in an aerial fight, wins the air derby, and gains Stella's consent to become his bride.
Bruce is a champion aviator and member of the secret service, and Juan's rival for Zella's hand. He saves Zella during a dangerous midair transfer, later pursues Juan after Blythe reports what she saw, and escapes capture with help from a former buddy among Juan's henchmen. He ultimately rescues Blythe from the water, captures Juan, and begins an aerial honeymoon with her.
Al Wilson has 20 screen credits in a career dating back to 1923. Signature works include The Sky Skidder, The Cloud Dodger, Won in the Clouds. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.
