Renny Harlin is a Finnish film director, producer, and screenwriter who has worked in Hollywood, Europe, and China. His best-known films include A Nightmare on Elm Street 4: The Dream Master, The Adventures of Ford Fairlane, Die Hard 2, Cliffhanger, The Long Kiss Goodnight, and Deep Blue Sea.

A Nightmare on Elm Street 4: The Dream Master is a 1988 American fantasy slasher film directed by Renny Harlin, and is the fourth installment in the A Nightmare on Elm Street franchise. Serving as a sequel to A Nightmare on Elm Street 3: Dream Warriors (1987), the film follows Freddy Krueger who, following the death of Nancy Thompson and completing his revenge against the families who killed him, reappears in the dreams of Kristen Parker, Joey Crusel, and Roland Kincaid, where he uses Kristen's best friend, Alice Johnson, to gain access to new victims in order to satiate his murderous needs. The Dream Master is often popularly referred to as "the MTV Nightmare" of the franchise.