The Avengers.S04E16.Small Game for Big Hunters

An English tropical jungle harbours a pompous professor, a mad colonel, a war-painted spy, and a bioweapon against an African nation.
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Teleplay by Philip Levene
Directed by Gerry O'Hara
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Guest Starring: Bill Fraser, James Villiers, Liam Redmond, Peter Burton, Paul Danquah, Tom Gill, Peter Thomas