The Master Key

The Master Key

13 Episodes

Universal's 64th of 69 sound-era serials (between "Jungle Queen" with Ruth Roman and their 2nd version of "Secret Agent X-9" with Lloyd Bridges), is set in 1938 with Nazi agents kidnapping scientist Professor Ellwood Henderson in order to get his Orotron machine that can extract gold from seawater. Operating under the secret leadership of "The Master Key", with the operatives headed by a German agent posing as a private investigator named Garrett Donovan, the gang is trailed by Federal agent Tom Brant, aided by police detective Lieutenant Jack Ryan and newspaper reporter Janet Lowe.

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The Master Key
  • The Master Key Chapter 1: Trapped by Flames

    Episode 1

    Universal's 64th of 69 sound-era serials (between "Jungle Queen" with Ruth Roman and their 2nd version of "Secret Agent X-9" with Lloyd Bridges), is set in 1938 with Nazi agents kidnapping scientist Professor Ellwood Henderson in order to get his Orotron machine that can extract gold from seawate...

  • The Master Key Chapter 2: Death Turns the Wheel

    Episode 2

    Universal's 64th of 69 sound-era serials (between "Jungle Queen" with Ruth Roman and their 2nd version of "Secret Agent X-9" with Lloyd Bridges), is set in 1938 with Nazi agents kidnapping scientist Professor Ellwood Henderson in order to get his Orotron machine that can extract gold from seawate...

  • The Master Key Chapter 3: Ticket to Disaster

    Episode 3

    Universal's 64th of 69 sound-era serials (between "Jungle Queen" with Ruth Roman and their 2nd version of "Secret Agent X-9" with Lloyd Bridges), is set in 1938 with Nazi agents kidnapping scientist Professor Ellwood Henderson in order to get his Orotron machine that can extract gold from seawate...

  • The Master Key Chapter 4: Drawbridge Danger

    Episode 4

    Universal's 64th of 69 sound-era serials (between "Jungle Queen" with Ruth Roman and their 2nd version of "Secret Agent X-9" with Lloyd Bridges), is set in 1938 with Nazi agents kidnapping scientist Professor Ellwood Henderson in order to get his Orotron machine that can extract gold from seawate...

  • The Master Key Chapter 5: Runaway Car

    Episode 5

    Universal's 64th of 69 sound-era serials (between "Jungle Queen" with Ruth Roman and their 2nd version of "Secret Agent X-9" with Lloyd Bridges), is set in 1938 with Nazi agents kidnapping scientist Professor Ellwood Henderson in order to get his Orotron machine that can extract gold from seawate...

  • The Master Key Chapter 6: Shot Down

    Episode 6

    Universal's 64th of 69 sound-era serials (between "Jungle Queen" with Ruth Roman and their 2nd version of "Secret Agent X-9" with Lloyd Bridges), is set in 1938 with Nazi agents kidnapping scientist Professor Ellwood Henderson in order to get his Orotron machine that can extract gold from seawate...

  • The Master Key Chapter 7: Death on the Dial

    Episode 7

    Universal's 64th of 69 sound-era serials (between "Jungle Queen" with Ruth Roman and their 2nd version of "Secret Agent X-9" with Lloyd Bridges), is set in 1938 with Nazi agents kidnapping scientist Professor Ellwood Henderson in order to get his Orotron machine that can extract gold from seawate...

  • The Master Key Chapter 8: Bullet Serenade

    Episode 8

    Universal's 64th of 69 sound-era serials (between "Jungle Queen" with Ruth Roman and their 2nd version of "Secret Agent X-9" with Lloyd Bridges), is set in 1938 with Nazi agents kidnapping scientist Professor Ellwood Henderson in order to get his Orotron machine that can extract gold from seawate...

  • The Master Key Chapter 9: On Stage for Murder

    Episode 9

    Universal's 64th of 69 sound-era serials (between "Jungle Queen" with Ruth Roman and their 2nd version of "Secret Agent X-9" with Lloyd Bridges), is set in 1938 with Nazi agents kidnapping scientist Professor Ellwood Henderson in order to get his Orotron machine that can extract gold from seawate...

  • The Master Key Chapter 10: Fatal Masquerade

    Episode 10

    Universal's 64th of 69 sound-era serials (between "Jungle Queen" with Ruth Roman and their 2nd version of "Secret Agent X-9" with Lloyd Bridges), is set in 1938 with Nazi agents kidnapping scientist Professor Ellwood Henderson in order to get his Orotron machine that can extract gold from seawate...

  • The Master Key Chapter 11: Crash Curve

    Episode 11

    Universal's 64th of 69 sound-era serials (between "Jungle Queen" with Ruth Roman and their 2nd version of "Secret Agent X-9" with Lloyd Bridges), is set in 1938 with Nazi agents kidnapping scientist Professor Ellwood Henderson in order to get his Orotron machine that can extract gold from seawate...

  • The Master Key Chapter 12: Lightning Underground

    Episode 12

    Universal's 64th of 69 sound-era serials (between "Jungle Queen" with Ruth Roman and their 2nd version of "Secret Agent X-9" with Lloyd Bridges), is set in 1938 with Nazi agents kidnapping scientist Professor Ellwood Henderson in order to get his Orotron machine that can extract gold from seawate...

  • The Master Key Chapter 13: The Last Key

    Episode 13

    Universal's 64th of 69 sound-era serials (between "Jungle Queen" with Ruth Roman and their 2nd version of "Secret Agent X-9" with Lloyd Bridges), is set in 1938 with Nazi agents kidnapping scientist Professor Ellwood Henderson in order to get his Orotron machine that can extract gold from seawate...