Blood on My Shoes (1983)

Agents across the globe take turns spying on and double-crossing one another in an attempt to locate a valuable formula encrypted in the music code.
An obscure Franco, apparently loosely based on Edgar Wallace's story 'Sanders of the River.', little-seen shoestring comedy/action/spy/thriller. A quintessential cast, Vernon goes characteristically and  gloriously over the top as the murdered - or is he? - missile inventor in full Mad Scientist key. Lina charms as a cabaret singer...or is she a spy? Or is she both? And Mayans is the most laid-back, unflappable tough guy you'll ever see.
Music plays a prominent role, in different ways...beyond the typically-awesome minimal jazz soundtrack (credited to Pablo Villa...aka Daniel White, a regular Franco collaborator...though some sources credit the music here to Franco himself).