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McGarrett and the team must find out who is behind a series of ecological stunts, when it is feared that a company executive will be their next target.
Release date: 1971-12-21
Season number: 4
Episode number: 13
Runtime: 60 minutes
Herbert Jeffreys - Klosmosky, Maura McGiveney - Miss Weston, Nephi Hannemann - Aku