Sonny and Will become suspected of kidnapping when a Russian concert pianist stows away in their truck in order to do some American sightseeing.

Our two heroes take on a trucking assignment in Baltimore (where the show was filmed), get caught up in a extortionist's plot involving a factory owner and some baddies. Result is a bomb secreted in a cargo the boys are carrying.

Sonny tells a national magazine that truckers are the toughest men in America, and lands in a Marine boot camp to prove it.

Anna May, a supposedly peaceful pachyderm, spells trouble when the elephant turns out to be such a not-so-peaceful cargo for Sonny. When Sonny and Will's rig, along with its cargo - an elephant and a stowaway, is stolen and opened, the pachyderm goes on a costly rampage.

Mrs. Biellin, a widow (Collin Wilcox) stubbornly lays claim to a park in the middle of Mobile, Ala. Sonny and Will come to the aid of a no nonsense widow who is determined to locate her mobile home on a lot willed to her by her late husband, a lot which turns out to be a public park.

Sonny and Will's trailer catches fire, destroys a tobacco curing shed, and causes injury and hardship to a black farmer.

Sonny and Will seek the daddy of a 4-year-old girl who mistakenly climbed into their truck during a stopover.

Sonny and Will are really in trouble here — their truck has been repossessed because they're behind on the payments. But don't be misled, this is a humorous episode, as they try to scratch up the money to reclaim the truck, and end up having to race the new owners in an old heap to Raleigh. N.C. Rosey Grier and Art Metrano pop up once again as the underhanded double-crossers who buy our heroes' rig at auction, and there's talented Diane Ladd to help save the day as a Salvation Army worker.

Sonny and Will make a pair of separate deals—one to let a girl drive their rig and the other to drive in a stock car race. Guest star Rory Calhoun is also featured as a man who pretends to be a drunk because that is how the local folks like him

The storyline concerns the truck driver stars' involvement in a group of non-union miners' pleas for safety measures. Patricia Neal guest stars as a poor widow who owns the mine.

Sonny and Will rescue bus passengers and an injured driver after a blowout and get pinned down by a sniper. Sonny and Will are at the scene of a bus accident which wasn't an accident at all. They and the passengers, plus the injured bus driver, end up at an old farmhouse, besieged by bad guys.

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An armed convict (Ralph Richard Redpath) commandeers the truck.

Will falls in love with a truck-driving widow (Fionnula Flanagan) who offers a hauling job that pays more than it should.

An offbeat yarn here as Sonny and Will become involved in a Southern balloon race, involuntarily of course. They'd rather drive their truck. Sonny and Will give up a lucrative hauling contract to prevent a man and his grand-daughter from risking their lives in a balloon race.

Sonny contracts for eight additional rigs for hauling chickens only to face disaster when a chicken epidemic closes the processing plant. A mysterious ailment affects everyone's chickens except those of a farmer (Rosemary Murphy) who's not a member of the cooperative.

Sonny and Will switch rigs in a dangerous game to recoup their losses. The guys on are shepherding a rock group and their instruments to New Orleans, where Sonny finds the group's mentor (Jackie Coogan) has been swindled by a guy who swindled Sonny out of his rig some quarter-century earlier. So it becomes a matter of rigging that old "sting."

Sonny clashes with a tyrannical steel-mill owner. After Will is injured and hospitalized, Sonny is befriended by a female trucker and joins her to confront an enraged and dangerous steel mill manager.

A man rents the truck for an incredible $1000 and an all-expense-paid vacation at a swank resort.

Sonny and Will are unwitting accomplices in a bookmaking operation when a bookie hides his day's collections in their truck.

Sonny takes up skin diving in bayou country. The action revolves around a search for sunken treasure, as Sonny hooks up with some old, cantankerous friends in the southern bayou country.

Sonny (Claude Akins) proves he's a likeable singer when he performs at a trucker's convention stag night and has visions of stardom. A conniving talent agent (Vera Miles) convinces Sonny that he has the makings of a country-music superstar.