Lucas is out for vengeance when Mark is used as a pawn in a bank robbery scheme.
Guest Stars:
Jack Kruschen, Harold J. Stone, Marc Lawrence
Lucas shoots a horse thief who turns out to be a member of the Boyle clan, and now Ma Boyle is after him.
Guest Stars:
Dee J. Thompson, Lane Bradford
Seven condemned murderers escape and take over the town of North Fork.
Guest Stars:
Don Megowan, Bing Russell
When Mark finds gold on their property, a fast-talking salesman who tried to sell Lucas a new lightning rod offers instead to buy the ranch's mineral rights.
Guest Stars:
John Milford, Paul Wexler, Bob Sweeney
Lucas tracks an escaped prisoner to a town that turns out to be run by the gunman's brother, notorious for shooting people in the back.
Guest Stars:
Milton Parsons, Claude Akins, William Schallert, Peter Whitney, Joe Higgins
When an outlaw leader lures Marshal Torrance out of town, Lucas is the only one who can stop him from lynching a local man who killed one of the members of his gang.
Guest Stars:
John Milford, Cesare Danova, Jack Kruschen, Linda Dangcil
A former army captain comes to North Fork to kill the man who shot down his son in a gunfight - Lucas McCain.
Guest Stars:
John Hoyt, Richard Alexander, Don Dubbins
A new store owner upsets the town by demanding that all credit accounts be paid off.
Guest Stars:
Joan Taylor, Michael Fox, Warren Oates, Richard Devon
The widow of a bandit killed by Lucas plots a grotesque revenge.
Guest Stars:
Ed Nelson, Chris Alcaide
Mark and his friend become trapped in an old mine.
Guest Stars:
Arnold Moss
A con man and his fast-gun friend come to North Fork. Lucas enters a target shooting contest.
Guest Stars:
Denny Miller, Dabbs Greer, Dabbs Greer, Ollie O'Toole, Robert F. Hoy
Lucas encourages a drunken artist charged with murder to use his talents to identify the true killer.
Guest Stars:
Ed Nelson, Richard Whorf, Dayton Lummis, Joe Perry
Lucas and Mark try to persuade a persecuted young mute to return stolen money.
Guest Stars:
Bill Quinn, Brad Weston, Robert B. Williams, James Chandler, Richard Devon
A lively old lady arrives in town hot on the trail of a notorious bandit—and the reward money for capturing him.
Guest Stars:
Richard Anderson, Agnes Moorehead, Glenn Strange, Mel Allen, Leonard Stone
A doctor seeks revenge on the man he blames for ruining his practice.
Guest Stars:
John Larch, Ron Hayes
Lucas unmasks a killer posing as a door-to-door seed salesman.
Guest Stars:
Patricia Breslin, Jean Allison, Richard Anderson
Lucas and Marshal Torrance run in trouble transporting a captured killer back to face trial.
Guest Stars:
Lonny Chapman
A deathbed request from an old friend sends Lucas to a neighboring town in search of the man's long-lost sweetheart.
Guest Stars:
Diana Millay, Herb Armstrong, Morris Ankrum
Lucas thinks he has seen a ghost when a young man, eerily similar to a man he killed in the Civil War, challenges him to a gunfight.
Guest Stars:
Ben Cooper
Lucas agrees to take a job as a federal undercover agent and goes to Wyoming to investigate rumors of sales of arms to renegade indians. His life is endagered by the town drunk who stumbles onto his true identity and purpose. (Part 1 of 2)
Guest Stars:
Dabbs Greer, Kent Taylor, Chris Alcaide, Joe Higgins
Mark heads for Wyoming to search for Lucas, who's on the trail of a gang illegally selling weapons to the Indians. (Part 2 of 2)
Guest Stars:
Dabbs Greer, Kent Taylor, Chris Alcaide, Joe Higgins
Lucas looks for answers when recovering alcoholic Micah Torrence returns to the bottle—and turns in his badge.
Guest Stars:
Berry Kroeger, Rex Ingram, Bill Quinn
In a ghost town, Lucas, Mark and Micah tangle with the Newman family and learn the secret of the town's 20-year-old mystery of a lost gold mine.
Guest Stars:
William Fawcett
Blinded in an explosion, Lucas fights despair as he prepares for a meeting with a gun-toting enemy.
Guest Stars:
John Milford, Ralph Moody, Joe Higgins
Two ex-Confederate officers seek revenge on Lucas, who served as prison guard during their internment.
Guest Stars:
John Dehner, Bill Quinn, Adam Williams
A salesman can't talk his way out of an assault charge.
Guest Stars:
Paul Mantee, King Calder, Bob Sweeney
Lucas, accused of horse theft, struggles to clear himself before a lynch mob catches up.
Guest Stars:
Bert Freed, Hal Baylor, Norman Leavitt, William Schallert, Joe Higgins
A janitor-turned-gunfighter whose reputation hangs on one lucky shot—and a lot of gall.
Guest Stars:
Buddy Hackett, John Milford, Lee Van Cleef, X Brands, Denver Pyle
Lucas tries to get help when he is shot after witnessing a murder.
Guest Stars:
Adam Williams
Lucas is marked for death: he was foreman of a jury that convicted an Apache.
Guest Stars:
Michael Pate, Joe Brown, Charles Watts, Kay E. Kuter
Trouble brews at Lucas's when a whisky salesman and a gunfighter fall for the same woman.
Guest Stars:
Adam West, Bethel Leslie, Gordon Jones, Joe Higgins
Two pranksters write away for a mail-order bride, using Lucas's name.
Guest Stars:
Joan Shawlee, Kay E. Kuter
Lucas recognizes Dr. Simon Battle as an ex-gunslinger with whom he once traded shots.
Guest Stars:
Gigi Perreau, Hank Stohl, John Pickard, Steve Pendleton, James Drury