The Twilight Zone - Ring-A-Ding Girl

Barbara 'Bunny' Blake is a well-known actress who receives a strange invitation from her sister Hildy Powell to return to Howardville, her hometown. Bunny owes her career to the the residents of Howardville who paid her way to Hollywood when was just starting out. She arrives on the same day as the town's annual picnic and feeling a sense of dread tries to have the event postponed. She doesn't get much cooperation and so takes matters into her own hands.