Bio-Man (partially found unaired pilot of Haim Saban adaptation of "Choudenshi Bioman" Super Sentai TV series; 1986)
Originally airing from 1984 to 1985, Choudenshi Bioman was Toei's eighth entry in their long-running Super Sentai franchise. In 1986, Israeli-American television producer Haim Saban produced a television pilot adapting the series for American audiences under the title Bio-Man. According to an article in the Los Angeles Times, the series a was space adventure series about five kids with identical "bio-rhythms" who defend Earth against Zadar's attacks, a half-human, half-robot who wanted to conquer the world. Said article also mentioned that actor's unions and a coalition of television producers were locked in contract negotiations. While negotiations between the two groups were settled and a pilot was filmed, Bio-Man ultimately never aired.
In 1992, however, Saban Brands reused footage from the pilot mixed with footage from the 1992 series Kyoryu Sentai Zyuranger as promotional video for Bandai entitled Galaxy Rangers. While Zyuranger would be adapted as Mighty Morphin' Power Rangers starting in 1993, it, understandably, utilized different actors from the Bio-Man pilot and the complete pilot, if it still exists, has never been released.