Julie Walters stars as a single mother seemingly haunted by a sinister telephone system that seems to have become an evil intelligence in its own right.

Julie Walters
Mavis
George Lapham
Danny

David Rappaport
Arthur
Robert Kingswell
Ronnie
Joe Black
Mavis' Dad

Ken Campbell
Tim Rickett

Janet Henfrey
Teacher

John Abineri
Playwright

Rosalind March
Sarah
Otto Diamant
Bruckenhaur
Dan Gregory
Cyril
Hugo Bower
German Dentist

Wolf Kahler
German Interviewer
Bert Parnaby
Phone Poet

Christopher Ellison
Telecom Engineer