Bill and Patty rescue a swimmer at sea, and then discover that his wife and son are still back in a sea cave, which will be underwater at high tide.
Patty takes over when she sees a fisherman haul in a radium-poisoned tuna.
A crusty old waterfront character is framed by yacht thieves.
Bill is hired to recover the body of a bank robber who was thought to have drowned while attempting his getaway.
Greer tries to help his friend, whose son has gotten involved with racketeers
Greer and Patty pay a call on widow Simmons and Patty sees the late Mr. Simmons through a window.
Greer locates a sunken plane and prepares to salvage it, but teenagers sabotage his plans.
J. Willard Stone offers a huge sum to the man who can bring up a sunken strongbox
Greer and a friend are trapped underwater with no one above to help them.
Greer rescues two suspicious men who thank him by running away.
Greer races to save an archaeologist trapped in a flooded tomb.
Greer is hired to rescue a kidnapped dignitary.