Overview
An experimental vaccine is stolen, and the subsequent test proves deadly. Steed and Keel, suspecting that the human 'guinea pig' did not die directly from the vaccine, volunteer to be the next subjects.
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1 - 1Hot Snow January 07, 1961 -
1 - 2Brought to Book January 14, 1961 -
1 - 3Square Root of Evil January 21, 1961
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1 - 4Nightmare January 28, 1961
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1 - 5Crescent Moon February 04, 1961
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1 - 6Girl on the Trapeze February 11, 1961 -
1 - 7Diamond Cut Diamond February 18, 1961
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1 - 8The Radioactive Man February 25, 1961
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1 - 9Ashes of Roses March 04, 1961
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1 - 10Hunt the Man Down March 18, 1961
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1 - 11Please Don't Feed the Animals April 01, 1961
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1 - 12Dance with Death April 15, 1961
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1 - 13One for the Mortuary April 29, 1961
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1 - 14The Springers May 13, 1961
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1 - 15The Frighteners May 27, 1961 -
1 - 16The Yellow Needle June 10, 1961
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1 - 17Death on the Slipway June 24, 1961
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1 - 18Double Danger July 08, 1961
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1 - 19Toy Trap July 22, 1961 -
1 - 20Tunnel of Fear August 05, 1961 -
1 - 21The Far Distant Dead August 19, 1961
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1 - 22Kill the King September 02, 1961
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1 - 23Dead of Winter December 09, 1961
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1 - 24The Deadly Air December 16, 1961
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1 - 25A Change of Bait December 23, 1961
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1 - 26Dragonsfield December 30, 1961