Workmen transporting a truckload of nitroglycerin imperil a town and a construction crew.
A tunnel collapses after a disgruntled employee and his lawyer pursue the construction supervisor Kodiak (Keenan Wynn) into the tunnel to serve him a summons.
Kodiak's highway crew is held at bay by an old lady and she's a mean shot with a rifle.
In Kodiak's absence, Dugan hires an ailing man as the underwater foreman, opening the way for disaster.
A boxing construction worker causes a problem among the men.
Building a hydroelectric plant, Kodiak is kidnapped, and a town's safety threatened.
In a scheme to steal the company payroll, a workman uses a young motorcycle thief as the patsy.
Laying an oil pipeline in the Near East is no cinch. Local rebels are plotting to kill the king.
Dugan and Kodiak work feverishly to save a boy trapped in a ground fissure.
Kodiak and Dugan find trouble between a religious sect and a wealthy landowner when they go to Canada to check on an irrigation project.
Kodiak is sent to find out why Pacific island construction job is behind schedule.
Drilling in Bavaria, Kodiak finds an underground fortress manned by Germans who don't know the war is over.
Dugan has a tough settlement when it's learned that he's already built on private property.
Kodiak intercedes when he discovers that water has been cut off from an orphanage in Greece.
A religious fanatic halts an oil job in Canada.
Acrophobia tests the pride of an Indian whose tribe is famous for courageous labor on high buildings.
A Japanese deserter is determined to sabotage Kodiak's project.
Hired by a South American ruler to develop an oil field, Kodiak is forced to take some revolutionists prisoner. Retaliating, the rebels kidnap Kodiak.
Head-hunters interrupt a group of road builders in a Far Eastern jungle.
Building crews don't want to leave their two-year homes on the Mississippi but they need a strong dam.
Dugan defies Kodiak's orders not to join in the hunt for a plane-crash victim.
In the Central American highlands, Kodiak is given a burro that turns out to be more trouble than expected.
Kodiak and Dugan are up against history when a Civil War monument impedes a road job.
It's brains vs. brawn as Dugan and Kodiak try to rescue miners from a cave-in.
Natives working on a flood-control project in South Vietnam are harassed by a stranger.
Kodiak quarrels with a circus owner who then cancels a benefit performance for a young, crippled boy. Dugan and the crew convert Stenrud equipment into rides, don circus garb and transform the construction site into a midway.