Take an Antonioni classic, Blow-up, make it about sound rather than pictures, add a dash of Kennedy crisis (Chappaquiddick/Texas), mix in a hint of right-wing conspiracy theories, use the ideas in Coppola’s The Conversation, and whisk into a Hitchcockian pastiche. And there you have it. A recipe for one of the key films of the Eighties, courtesy of Brian De Palma. This man knows his movies. Shot by Vilmos Zsigmond, sound by Pino Donaggio, star by John Travolta. Yum.