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In page Bruce Lee:

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In a controversial move, Robert Clouse finished the film using a Lee look-alike (Kim Tai Chung, with Yuen Biao as a stunt double) and archive footage of Lee from his other films with a new storyline and cast. It was released in 1978. The cobbled-together film contained only fifteen minutes of actual footage of Lee.[2] The unused footage Lee had filmed was recovered 22 years later and included in the documentary Bruce Lee: A Warrior's Journey.[citation needed]