Summary: Led by a sinister minister, a controlling religious sect called the Brethren has taken control of widow Birdy Wemys, sending her unstable son, Kenny, into a spiraling descent into madness and murder. No woman is safe when Kenny's religious mania overpowers him and leads to a rampage of carnage and chaos! (imdb)

AKA: Beware My Brethren

Genre: Horror

Country: UK

Directed By: Robert Hartford-Davis

Written By: Brian Comport

Starring: Patrick Magee, Tony Beckley, Ann Todd, Percy Herbert, Suzanna Leigh, Madeleine Hinde

More information at the Internet Movie Database