Chris Alcaide made ten appearances in THE RIFLEMAN, portraying different characters in each episode.  He is best known for his roles in westerns, having appeared in over 400 television western programs.  Alcaide, a veteran character actor of great range and talent appeared in a wide variety of projects, including "The Glass Menagerie," "The Wild One" with Marlon Brando, "Assassination" with Charles Bronson and "Kid Galahad" with Elvis Presley.  Other movie credits include "The Miami Story," "Gunslinger," "Miami Expose," "The 49th Man," "Massacre Canyon" and "Rock All Night."

Patricia Blair was an American television actress whose career was active primarily in the 1950s and 1960s.   The Texas-born beauty began her career as a teenage model who went on to apprentice in summer stock before being discovered by Warner Bros.  She began acting in films under the names Patricia Blake and Pat Blake.   She appeared in a few films, including "Jump Into Hell" (1955), "Crime Against Joe" (1956) and "The Black Sleep" (1956), which reunited screen icons of the horror film genre Bela Lugosi, Lon Chaney Jr., Basil Rathbone and John Carradine.   She also appeared in the suspense thriller "City of Fear" (1959), starring Vince Edwards.  She portrayed the Fashion Narrator in the Robert Redford romantic western "The Electric Horseman" (1979), co-starring Jane Fonda.

In 1962, Blair replaced actress Joan Taylor in a semi-regular role as Lou Mallory, Chuck Connor's love interest in the last season of THE RIFLEMAN.  Blair played the attractive red-haired, fiery Irish businesswoman, whose character was savvy Landowner and Owner of the General Store and the Madera House Hotel.  Blair's character of Lou Mallory appeared in 17 episodes of THE RIFLEMAN; she debuted in the title role of episode 145.  Blair also made guest television appearances on "The Bob Cummings Show" (1955–1959), "The Virginian" (1962–1971), "Perry Mason" (1957–1966), "Bonanza" (1959–1973), and she co-starred in "Daniel Boone" (1964–1970), playing wife Rebecca Boone opposite Fess Parker.   She also had a recurring role as Goldy in the western adventure series "Yancy Derringer" (1958–1959). 

Dean Fredericks, born Frederick Joseph Foote, was an American film and television actor.  He appeared in 40 movies and television shows in slightly more than a decade.  He served in the military during World War II, for which he received a Purple Heart.  He began acting in the early 1950s and worked under various names, including "Fred Foote" and "Norman Fredric," before finally settling on "Dean Fredericks."  While working on the set of the TV series "The Court of Last Resort" (1957–1958), he was discovered by Milton Caniff, the comic strip creator who later tapped him to play the title role in the TV version of "Steve Canyon" (1958–1960).  Fredericks made two appearances in THE RIFLEMAN, portraying Phil Carver in "Squeeze Play" (episode 152) and Rance in "Requiem at Mission Springs" (episode 164).  He also guest-starred in several other westerns, including "Maverick" (1957–1962), starring James Garner, "Cheyenne" (1955–1963), starring Clint Walker, "The Deputy" (1959–1961), starring Henry Fonda, "Rawhide" (1959–1966), starring Clint Eastwood, and "The Virginian" (1962–1971), starring James Drury and Doug McClure.

Henry Madden worked briefly as actor, with just a few titles to his credit.  He portrayed film director Easton in "The Small Hours" (1962), written and directed by Norman C. Chaitin.  Henry Madden made one appearance in THE RIFLEMAN, portraying Hal Spencer in "Squeeze Play" (episode 152).

Gerald Mohr was a character actor of radio, stage, film and television.  He appeared in 150 movies and television shows during a career spanning 30 years.  He got his start in radio, eventually making the transition to stage acting via the Orson Welles Mercury Theatre company.  He placed his acting career on hold in order to serve in the Air Force during World War II.  A familiar voice in radio, Mohr gradually made the transition to television during the 1950s.  He is best-remembered for his portrayals of slick, professional villains.  He had several memorable film roles, including Capt. Delgado in the noir film "Gilda" (1946), starring Rita Hayworth, Glenn Ford and George Macready; Tami Giacoppetti in the noir film "Detective Story" (1951), starring Kirk Douglas, Eleanor Parker, William Bendix, Cathy O'Donnell and Lee Grant; and Tom Branca in the romantic musical "Funny Girl" (1968), starring Barbra Streisand and Omar Sharif.

Mohr guest-starred in several popular television shows of the 1950s and 60s, including the sitcom "I Love Lucy" (1951–1957), the anthology series "Four Star Playhouse" (1952–1956), the private detective series "77 Sunset Strip" (1958–1964), the espionage series "The Man from U.N.C.L.E." (1964–1968) and the legal drama "Perry Mason" (1957–1966).  He also had various recurring roles, including the narrator in the western "The Lone Ranger" (1949–1957), Christopher Storm in the drama "Foreign Intrigue" (1951–1955) and Mr. Fantastic in the animated superhero series "Fantastic 4" (1967).

Mohr made one appearance in THE RIFLEMAN, portraying Willard Prescott in "Squeeze Play" (episode 152).  He guest-starred in virtually all of the other iconic westerns, including "Zane Grey Theater" (1956–1961), "Wanted: Dead or Alive" (1958–1961), "Rawhide" (1959–1966), "Tales of Wells Fargo" (1957–1962), "The Deputy" (1959–1961), "Cheyenne" (1955–1963), "Bat Masterson" (1958–1961), "Maverick" (1957–1962), "Death Valley Days" (1952–1975), "Bonanza" (1959–1973) and "The Big Valley" (1965–1969).