7. Kirstie Alley - Star Trek III: The Search For Spock
Kirstie Alley played the role of Lt. Saavik in Star Trek II: The Wrath of Khan. Saavik would appear in the Star Trek III but allegedly Alley's agent asked for a massive salary increase to return for The Search for Spock. Her salary would have been higher than that of DeForest Kelley. Her agent's request was denied by producer Harve Bennett and director Leonard Nimoy and the role was recast with an unknown named Robin Curtis. Alley herself denies this, stating that she was surprised she was rejected for the role and that the studio offered her less money than she made for Wrath of Khan and never presented a counter offer. In another account by Alley, she was going through an emotional time after her mother was killed by a drunk driver in an automobile accident and that's why she refused to return for the sequel. Whatever the reason for Alley's departure, the fans and filmmakers were not pleased with Curtis' portrayal of Saavik. When Nicholas Meyer, director of Wrath of Khan, was brought on to direct Star Trek VI: The Undiscovered Country, he wanted Saavik to reappear and he wanted Alley to reprise the role. She was once again too expensive and/or unavailable (likely due to her role on Cheers) and they instead created a new character Valeris, played by Kim Cattrall.