Jack's Back is a 1988 American mystery thriller film written and directed by Rowdy Herrington in his directorial debut.

It stars James Spader in dual roles, Cynthia Gibb, Jim Haynie, Robert Picardo, Rod Loomis, and Rex Ryon.

In Los Angeles, a young doctor named John Wesford becomes a suspect when a series of Jack the Ripper copycat killings is committed.

John and another young doctor, Jack Pendler, are at the scene of the latest crime in the series; they know each other because they both work for the same medical unit, reporting to the abusive Dr. Sidney Tannerson.

Chris survives and Rick avenges his brother's death by killing Tannerson, who (it is implied) had manipulated Pendler into murdering the unfortunate twin.

"[7] Michael Wilmington of the Los Angeles Times called the film "a psychological shocker that carves up the Jack the Ripper legend in convoluted but predictable ways" and wrote that "Herrington gets stuck in his triple-twists, stock characters, chases and movie-movie plotting."

"[8] Originally the director wanted to call the film Red Rain and have the song of the same name by Peter Gabriel playing as the opening credits theme.