context: The Planet of Peril
  
  The planet Mongo is on a collision course with Earth. Dr. Alexis Zarkov takes off in a rocket ship to Mongo, with Flash Gordon and Dale Arden as his assistants. They find that the planet is ruled by the cruel Emperor Ming, who lusts after Dale and sends Flash to fight in the arena. Ming's daughter, Princess Aura, tries to spare Flash's life.
  
  
  The Tunnel of Terror
  
  Aura helps Flash to escape as Zarkov is put to work in Ming's laboratory and Dale is prepared for her wedding to Ming. Flash meets Prince Thun, leader of the Lion Men, and the pair return to the palace to rescue Dale.
  
  
  Captured by Shark Men
  
  Flash stops the wedding ceremony, but he and Dale are captured by King Kala, ruler of the Shark Men and a loyal follower of Ming. At Ming's order, Kala forces Flash to fight with a giant octosak in a chamber filling with water.
  
  
  Battling the Sea Beast
  
  Aura and Thun rescue Flash from the octosak. Trying to keep Flash away from Dale, Aura destroys the mechanisms that regulate the underwater city.
  
  
  The Destroying Ray
  
  Flash, Dale, Aura and Thun escape from the underwater city, but are captured by King Vultan and the Hawkmen. Dr. Zarkov befriends Prince Barin, and they race to the rescue.
  
  
  Flaming Torture
  
  Dale pretends to fall in love with King Vultan in order to save Flash, Barin and Thun, who are put to work in the Hawkmen's Atom Furnaces.
  
  
  Shattering Doom
  
  Flash, Barin, Thun and Zarkov create an explosion in the atomic furnaces.
  
  
  Tournament of Death
  
  Dr. Zarkov saves the Hawkmen's city from falling, earning Flash and his friends King Vultan's gratitude. Ming insists that Flash fight a Tournament of Death against a masked opponent, revealed to be Barin, and then a vicious orangopoid.
  
  
  Fighting the Fire Dragon
  
  Flash survives the tournament with Aura's help, after she discovers the weak point of the orangopoid. Still determined to win Flash, Aura has him drugged to make him lose his memory.
  
  
  The Unseen Peril
  
  Flash recovers his memory. Ming is determined to have Flash executed.
  
  
  In the Claws of the Tigron
  
  Zarkov invents a machine that makes Flash invisible. Flash torments Ming and his guards. Barin hides Dale in the catacombs, but Aura has her tracked by a tigron.
  
  
  Trapped in the Turret
  
  Aura realizes the error of her ways, and falls in love with Barin. She tries to help Flash and his friends to return to EarthÂ â but Ming plots to kill them.
  
  
  Rocketing to Earth
  
  Ming orders that the Earth people be caught and killed, but Flash and his friends escape from the Emperor's clutches, and Ming is apparently killed in the flames of the "sacred temple of the Great God Tao". Flash, Dale and Zarkov make a triumphant return to Earth.[2]
question: Where is Vultan hiding?
answer: Arboria