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Abruptly departed: Suzanne Somers, right
Played: Chrissy Snow
Lasted: Four years (1977-81)
Why she left: Somers thought she was the star and started acting like it, co-opting photo shoots and demanding big money. She and her managers argued that she was irreplaceable. They were wrong.
How it went down on air: Chrissy moved back in with her parents, occasionally calling her roommates until Somers' contract was over.