- Country: UK
- Genres: Drama, Mystery
- Release: 1956-11-13
- Director: N/A
- Writers: Richard Llewellyn (I) (1906–1983)
- Language: English
- Stars: William Devlin , Gladys Young , Lyn James , Richard Bebb , Rachel Thomas , Frank Forsyth , Roddy Hughes , Richard Williams , Mary Jones , Jack Walters
- Runtime: 75 min
- Awards: N/A
- AKA: Poison Pen (United Kingdom) , Poison Pen
- Plot: N/A
- IMDB:tt5118646
Poison Pen Cast
William Devlin
The Rev. John Rainrider
Gladys Young
Phryne Rainrider
Lyn James
Rose Rainrider
Richard Bebb
Malcolm McLeod
Rachel Thomas
Mrs. Jenkins
Frank Forsyth
Inspector Davies
Roddy Hughes
Fullergrave-Rees
Richard Williams
Colonel Cashelton
Mary Jones
Mrs. Cashelton
Jack Walters
Richard