Invasion of the Body Snatchers

A race of gelatinous alien creatures abandon their dying world and land in San Francisco. They fall on plant leaves, assimilating them and forming small pods with pink flowers. Elizabeth Driscoll, an employee at the San Francisco Health Department, is one of several people who bring the flowers home. The next morning, Elizabeth's boyfriend, Geoffrey Howell, suddenly becomes distant, and she senses that something is wrong. Matthew realizes that people are being replaced by extraterrestrial copies.