Liquid Lips (1976)

Johnny Wadd has rescued Doreen during his Mexico adventure and returned to San Francisco, where he is hired by a special drug investigation unit to bust up a group importing cocaine from south of the border. Wadd enjoys two heated sexual liasons while keeping his nose to the grindstone for information about the drug smugglers. Holmes and Chinn faceoff again in fisticuffs as Wadd puts the finishing touches on solving the case.