Title: Mark McCain
Content:  Mark McCain is the son of fictitious rancher Lucas McCain in the ABC Western television series The Rifleman, starring Chuck Connors, which ran from 1958 to 1963. Singer/actor and former Mouseketeer Johnny Crawford was cast in the role and was nominated for an Emmy Award in 1959 as Best Supporting Actor (Continuing Character) in a Dramatic Series. However, Dennis Weaver, then portraying Chester Goode on CBS's Gunsmoke, won the honor. Mark McCain was more than just a supporting player in The Rifleman, as the boy's bond with his father was a core element of the show. In many ways he was the co-lead of the series and appeared in nearly every episode and in a majority of scenes.
Title: The Rifleman
Content:  The Rifleman is an American Western television program starring Chuck Connors as rancher Lucas McCain and Johnny Crawford as his son Mark McCain. It was set in the 1880s in the fictional town of North Fork, New Mexico Territory. The show was filmed in black and white, in half-hour episodes. The Rifleman aired on ABC from September 30, 1958, to April 8, 1963, as a production of Four Star Television. It was one of the first primetime series on US television to show a single parent raising a child. The program was titled to reflect McCain's use of a Winchester Model 1892 rifle, a historical anachronism, as the show was set in the 1880s, and customized to allow repeated firing by cycling its lever action. He demonstrated this technique in the opening credits, as well as a second modification that allowed him to cycle the action with one hand using a technique known as "spin-cocking".
Title: List of The Rifleman episodes
Content:  The Rifleman is an American Western television program that starred Chuck Connors as homesteader Lucas McCain and Johnny Crawford as his son, Mark McCain. The series was set in the 1880s in the town of North Fork, New Mexico Territory and was filmed in black-and-white with a half hour running time. The Rifleman aired on ABC from September 30, 1958 to April 8, 1963 as a production of Four Star Television. There were 168 episodes in the series.
Title: Mark McCain
Content:  Sam Peckinpah, the author of the first episode of The Rifleman, "The Sharpshooter," is generally acknowledged as one of the creators of the series. He wrote five episodes (three of which he also directed) in the first season, and he wrote and directed an episode in the second season. According to Christopher Sharrett in his 2005 book The Rifleman, “Peckinpah apparently wanted the series to focus on Mark, so that the series would be kind of bildungsroman, showing, in Peckinpah’s words, Mark’s 'discovery of what it’s all about.' Peckinpah’s vision, which would later show up in his films, was an “... essentialist, reductionist view of a violent world, one beset by the vile appetites of a new technocracy that was opposed by the hopelessly compromised yet relatively 
Title: Mark McCain
Content:  The Rifleman was unique for its time in making its protagonist a widower with a son, and thus burdening him with family responsibilities. This theme became more emphasized as the show developed in its five seasons, not only as a counterpoint to the violence of the show (the F.C.C. began pressuring networks to tone down violence in 1961 ), but to elucidate the theme of the introduction of civilization to the West, as Lucas brings Mark up with a respect for the rule of the law and fair play as part of the process of instilling moral values in his son. The emphasis on the father-son relationship also was a result of the popularity of Johnny Crawford's portrayal of Mark and his chemistry with his father. Holly George-Warren recalled, "I remember me and all my girlfriends having crushes on Johnny."
Title: The Rifleman
Content: Chuck Connors as Lucas McCain, a rancher, a Union Army veteran of the American Civil War, father, and widower ; Johnny Crawford as Mark McCain, Lucas's son ; Paul Fix as Micah Torrance, marshal of North Fork, New Mexico 
Title: The Rifleman
Content: Bill Quinn as Frank Sweeney, the North Fork Saloon bartender ; Patricia Blair as Mallory House hotel owner Lou Mallory ; Joe Higgins as blacksmith Nels Swenson ; Harlan Warde as banker John Hamilton ; Joan Taylor as general store owner Milly Scott ; Hope Summers as general store owner Hattie Denton ; John Harmon as hotel clerk Eddie Halstead ; Chris Alcaide as a regular baddie (10 episodes)  Seven actors played the town doctor during the series (usually known as "Doc Burrage"): Edgar Buchanan, Fay Roope, Rhys Williams, Jack Kruschen, Robert Burton, Ralph Moody, and Bert Stevens. Several actors also played blacksmith Nels Swenson.
Title: The Rifleman
Content:  More than 500 actors made guest appearances in more than 970 credited roles during the five-year run of the series. Guest stars included veteran actors: John Anderson, Richard Anderson, Whit Bissell, John Carradine, Lon Chaney, Jr., Ellen Corby, Sammy Davis, Jr., John Dehner, Jack Elam, Med Flory, Dabbs Greer, Rodolfo Hoyos, Jr., L.Q. Jones, John Milford, Rex Holman, Agnes Moorehead, Denver Pyle, Lee Van Cleef, and Adam West, most appearing multiple times in different roles. Several then-newcomers also appeared in the series, including Claude Akins, James Coburn (credited as "Jim") Mark Goddard, Dan Blocker, Dennis Hopper, Michael Landon, Warren Oates, Harry Dean Stanton, Robert Vaughn, Robert Culp (who starred in his own western series for Four Star Productions, "Trackdown" from 1957–59), Martin Landau, and Richard Kiel. Notable people in other fields also made cameo appearances such as future baseball Hall of Famers Duke Snider and Don Drysdale, comedian Buddy Hackett and writer, director and producer Paul Mazursky. <!-- Please keep list hidden until Episode List is made and can be moved • 4 --> With the death of Johnny Crawford on April 29, 2021, all main and recurring cast members of The Rifleman are now deceased.
Title: The Rifleman
Content:  The pilot episode, "The Sharpshooter", was originally telecast on CBS as part of Dick Powell's Zane Grey Theatre on March 7, 1958; it was repeated (in edited form) as the first episode of the series on ABC. The episode was written by Sam Peckinpah, and guest starred Dennis Hopper. Regulars on the program included Marshal Micah Torrance (R. G. Armstrong was the original marshal for two episodes, the first and the fourth), Sweeney the bartender (Bill Quinn), and a half-dozen other residents of North Fork (played by Hope Summers, Joan Taylor, Patricia Blair, John Harmon, and Harlan Warde). Fifty-one episodes of the series were directed by Joseph H. Lewis (director of 1950's Gun Crazy and known for his film noir style). Ida Lupino directed one episode, "The Assault". Connors wrote several episodes. Robert Culp (star of CBS's Trackdown, another Four Star-produced series), wrote one two-part episode, and Frank D. Gilroy (creator of ABC's 'Burke's Law', another Four Star-produced series), wrote "End of a Young Gun".
Title: The Rifleman
Content:  The opening theme at the beginning of each episode depicted McCain walking down the street of a town while rapid-firing his Winchester 44-40 1892 model rifle that had been modified at the trigger and lever. The rifle's modification allowed McCain to fire the rifle only by hand pumping the lever, which had a setscrew imbedded in it to trip the weapon's trigger. At various points during the series, episodes would show McCain deftly handling and shooting the rifle ambidextrously. When Connors auditioned for the show, the director suddenly threw a rifle at him; the former Major League Baseball player caught it and got the job.

Question: who played mark on the show the rifleman?
Answer: John Ernest Crawford.