• Ron Ely
• Keith Larsen
• Jeremy Slate

Professional salvage divers Larry and Drake (later replaced by Mike) made their livings braving the dangers of the deep recovering sunken wrecks off the Southern California coast. Frequently, these assignments brought them into conflict with more human dangers from people who wanted to reach the wrecks first, or who had a vested interest in seeing that what had been sent to the bottom stayed there. Midway through the program's run, the divers moved their shop to Malibu, and name of the show became "Malibu Run".