- Country: Hungary, UK
- Genres: Horror, Thriller
- Release: 1989-04-14
- Director: Gérard Kikoïne
- Writers: J.P. Félix , Ron Raley
- Language: English
- Stars: Anthony Perkins , Anthony Perkins , Glynis Barber , Sarah Maur Thorp , David Lodge , Ben Cole , Ray Jewers , Jill Melford , Lisa Davis , Noel Coleman , Briony McRoberts (1957–2013)
- Runtime: 90 min
- Awards: N/A
- AKA: Al borde de la locura (Argentina) , Dr Jekyll & Mr Hyde (Australia) , Dr. Jekyll & Mr. Hyde (Japan) , À Beira da Loucura (Portugal, Portuguese Republic) , Edge of Sanity (United Kingdom) , Edge of Sanity (United States of America) , Su última psicosis (Mexico) , На межі безумства (Ukraine) , На грани безумия , Na krawędzi szaleństwa (Poland) , Au-delà de la folie (Canada) , Split - Edge of Sanity (Germany) , Edge of Sanity (Greece) , Dr. Jekyll et Mr. Hyde (France, French Republic) , Edge of Sanity , Dr. Jekyll e Mr. Hyde: sull'orlo della follia (Italy) , A Beira da Loucura (Brazil) , Järjen tuolla puolen (Finland) , Al borde de la locura (Spain) , Nattens inkräktare (Sweden)
- Plot: When Henry Jekyll's experiments with cocaine have gotten out of control, he transforms into the hideous Jack Hyde. As Hyde he searches the London streets at night for his prey in whorehouses and opium dens. The police can't catch him, he has nothing to lose but his mind...
- IMDB:tt0097263
Edge of Sanity Cast · · · ALL
Gérard Kikoïne
Director
Anthony Perkins
Dr. Henry Jekyll / Jack "The Ripper" Hyde
Glynis Barber
Elisabeth Jekyll
Sarah Maur Thorp
Susannah
David Lodge
Underwood
Ben Cole
Johnny
Ray Jewers
Newcomen
Jill Melford
Flora
Noel Coleman
Egglestone
Briony McRoberts
(1957–2013)
Ann Underwood
Mark Elliott
Lanyon
Harry Landis
Coroner
Jill Pearson
Mrs. Egglestone
Basil Hoskins
Mr. Bottingham
Cathy Murphy
Cockney Prostitute
Claudia Udy
Liza