An anonymous letter writer creates fear and havoc in the lives of three sisters.
| Name | Type | Role | |
|---|---|---|---|
| Gore Vidal | Writer | ||
| Felix Jackson | Producer | ||
| Leora Thatcher | Guest Star | Mrs. Wicks | |
| Leslie Nielsen | Guest Star | Dr. Roger Waring | |
| Milton Selzer | Guest Star | Mr. Weston | |
| Bramwell Fletcher | Guest Star | Governor Bell | |
| Geraldine Fitzgerald | Guest Star | Charlotte Bell Wheeler | |
| Helen Auerbach | Guest Star | Ann Bell | |
| Barbara O'Neil | Guest Star | Emily Bell | |
| Franklin J. Schaffner | Director |