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Greenway appeared twice in 1954-1955 on the Rod Cameron syndicated television series, ''City Detective.'' In 1955, he guest starred in the episode "The Big Genius" of [[NBC]]'s ''[[Dragnet]],'' starring and narrated by Jack Webb. In 1958, Greenway appeared four times on Rod Cameron's second syndicated series, ''State Trooper,'' western set in the 1950s. He portrayed Sheriff Bronson in the episodes "Stay Lost, Little Girl," "Dangerous Honeymoon," "Full Circle," and "Death on Wheels.'' In 1957, Greenway was cast in the episode "Copper Wire" of another syndicated crime drama, ''Sheriff of Cochise'', set in [[Arizona]]  in 1958, he portrayed Deputy Sheriff Tom Munger in the episode "Sentenced to Death" of Bromfield's successor series, ''U.S. Marshal.''<ref name=imdb/>

Greenway appeared twice in 1954-1955 on the Rod Cameron syndicated television series, ''City Detective.'' In 1955, he guest starred in the episode "The Big Genius" of [[NBC]]'s ''[[Dragnet]],'' starring and narrated by Jack Webb. In 1958, Greenway appeared four times on Rod Cameron's second syndicated series, ''State Trooper,'' western set in the 1950s. He portrayed Sheriff Bronson in the episodes "Stay Lost, Little Girl," "Dangerous Honeymoon," "Full Circle," and "Death on Wheels.'' In 1957, Greenway was cast in the episode "Copper Wire" of another syndicated crime drama, ''Sheriff of Cochise'', set in [[Arizona]]  in 1958, he portrayed Deputy Sheriff Tom Munger in the episode "Sentenced to Death" of Bromfield's successor series, ''U.S. Marshal.''<ref name=imdb/>

In 1958, he appeared as Kylie in the episode entitled "Geronimo," of Pat Conway ''Tombstone Territory,'' also set in Arizona. John Doucette was cast in the same episode as the [[Apache]] Chief Geronimo. Greenway appeared in 1958 as Dr. Quinn in "The Dan Hogan Story" of the NBC western series, ''Wagon Train.'' Another appearance in 1958 was as Lt. Peters in the episode "Double Jeopardy" of the [[CBS]] crime drama, ''Richard Diamond, Private Detective,'' starring David Janssen as a private investigator]]. In 1959, he portrayed John Sebrey in "Death of a Gunfighter" on Richard Boone's CBS western series, ''Have Gun - Will Travel].'' That same year, he played the role of rancher Frank Chanault in the film ''These Thousand Hills.''<ref name=imdb/>

In 1958, he appeared as Kylie in the episode entitled "Geronimo," of Pat Conway ''Tombstone Territory,'' also set in Arizona. John Doucette was cast in the same episode as the [[Apache]] Chief Geronimo. Greenway appeared in 1958 as Dr. Quinn in "The Dan Hogan Story" of the NBC western series, ''Wagon Train.'' Another appearance in 1958 was as Lt. Peters in the episode "Double Jeopardy" of the [[CBS]] crime drama, ''Richard Diamond, Private Detective,'' starring David Janssen as a private investigator]]. In 1959, he portrayed John Sebrey in "Death of a Gunfighter" on Richard Boone's CBS western series, ''Have Gun - Will Travel.'' That same year, he played the role of rancher Frank Chanault in the film ''These Thousand Hills.''<ref name=imdb/>

Between 1957 and 1960, he appeared in five different roles in five half-hour episodes of CBS's ''Gunsmoke,''  with James Arness. He appeared in 1961 in the episode "Gamble with Death" on the syndicated western anthology series,  ''Death Valley Days,'' with John ." Docette again playing Geronimo. That same year, Greenway guest starred twice on both NBC's ''Bat Masterson'' and CBS's ''Rawhide,''' in the latter as Hawthorne in "Incident at the Blackstorms." In 1961, Greenway also played warden Binns in the episode "The Return of the Widow Brown" of Henry Fonda's series,''The Deputy.''. That same year, he also played Glenn Cornell, a used car salesman, in the episode "Very Hard Sale" of NBC's police drama, ''87th Precinct.'' [[Peter Helm]] appeared as Cornell's son, Andy.<ref name=imdb/>​

Between 1957 and 1960, he appeared in five different roles in five half-hour episodes of CBS's ''Gunsmoke,''  with James Arness. He appeared in 1961 in the episode "Gamble with Death" on the syndicated western anthology series,  ''Death Valley Days,'' with John ." Docette again playing Geronimo. That same year, Greenway guest starred twice on both NBC's ''Bat Masterson'' and CBS's ''Rawhide,''' in the latter as Hawthorne in "Incident at the Blackstorms." In 1961, Greenway also played warden Binns in the episode "The Return of the Widow Brown" of Henry Fonda's series,''The Deputy.''. That same year, he also played Glenn Cornell, a used car salesman, in the episode "Very Hard Sale" of NBC's police drama, ''87th Precinct.'' [[Peter Helm]] appeared as Cornell's son, Andy.<ref name=imdb/>​