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Vivyan's first screen role was in the 1949 episode "Two Sharp Knives" of the ''Studio One'' anthology series at a time when relatively few residences had television access. In 1957, he appeared as the character Richard Goff with Broderick Crawford in the episode "Nitro" of the syndicated series, ''Highway Patrol.''. He guest starred in two other 1950s syndicated programs too, ''Harbor Command'' and ''State Trooper.'' In 1957, he was cast as Hewitt in "The Laura Hunter Story" on CBS's fantasy drama ,''The Millionaire.'' He starred too as Mack Barron in the episode "The Little Witness" on Loretta Young's [[NBC]] anthology series<ref name=imdb>{{cite web|url=https://www.imdb.com/name/nm0900387/|title=John Vivyan|publisher=Internet Movie Database|accessdate=April 3, 2021}}</ref>  

Vivyan's first screen role was in the 1949 episode "Two Sharp Knives" of the ''Studio One'' anthology series at a time when relatively few residences had television access. In 1957, he appeared as the character Richard Goff with Broderick Crawford in the episode "Nitro" of the syndicated series, ''Highway Patrol.''. He guest starred in two other 1950s syndicated programs too, ''Harbor Command'' and ''State Trooper.'' In 1957, he was cast as Hewitt in "The Laura Hunter Story" on CBS's fantasy drama ,''The Millionaire.'' He starred too as Mack Barron in the episode "The Little Witness" on Loretta Young's [[NBC]] anthology series<ref name=imdb>{{cite web|url=https://www.imdb.com/name/nm0900387/|title=John Vivyan|publisher=Internet Movie Database|accessdate=April 3, 2021}}</ref>  

Thereafter, he appeared in three Warner Brothers series on [[ABC]], two westerns ''Colt .45'' (as George F. Foley in "The Mirage") and ''Sugarfoot'' (as Victor Valla in the episode "Deadlock"), and then on the detective series ''77 Sunset Strip'' (as Mitch in "The Girl Who Couldn't Remember"). Vivyan appeared as LeBow in "Duel at the Oaks" in the CBS western ''Yancy Derringer,'', starring Jock Mahone]. He appeared twice in ABC's ''The Life and Legend of Wyatt Earp,'' starring Hugh O'Brian, twice on CBS's ''Rawhide,'' and twice on NBC's ''Bat Masterson,'' starring Gene Barry. He appeared four times from 1957 to 1959 as different characters on the ABC/WB western series, ''Maverick.''  He also appeared in the syndicated western series, ''Tombstone Territory,''  in the episode entitled "Desert Survival."  He appeared as the gangster Duke in the 1958 episode, "The Gentle Monster" on ''The Adventures of Superman.''<ref name=imdb/>

Thereafter, he appeared in three Warner Brothers series on [[ABC]], two westerns ''Colt .45'' (as George F. Foley in "The Mirage") and ''Sugarfoot'' (as Victor Valla in the episode "Deadlock"), and then on the detective series ''77 Sunset Strip'' (as Mitch in "The Girl Who Couldn't Remember"). Vivyan appeared as LeBow in "Duel at the Oaks" in the CBS western ''Yancy Derringer,'', starring Jock Mahoney. He appeared twice in ABC's ''The Life and Legend of Wyatt Earp,'' starring Hugh O'Brian, twice on CBS's ''Rawhide,'' and twice on NBC's ''Bat Masterson,'' starring Gene Barry. He appeared four times from 1957 to 1959 as different characters on the ABC/WB western series, ''Maverick.''  He also appeared in the syndicated western series, ''Tombstone Territory,''  in the episode entitled "Desert Survival."  He appeared as the gangster Duke in the 1958 episode, "The Gentle Monster" on ''The Adventures of Superman.''<ref name=imdb/>

Vivyan appeared twice in the role of Jason Hemp, a dishonest [[Texas]] rancher, on ABC's ''Disneyland'' in the western miniseries, ''Texas John Slaughter,'' with Tom Tryon in the title role. He also guest starred on Richard Carlson's syndicated western series, ''Mackenzie's Raiders.''<ref name=imdb/>

Vivyan appeared twice in the role of Jason Hemp, a dishonest [[Texas]] rancher, on ABC's ''Disneyland'' in the western miniseries, ''Texas John Slaughter,'' with Tom Tryon in the title role. He also guest starred on Richard Carlson's syndicated western series, ''Mackenzie's Raiders.''<ref name=imdb/>

Between 1959 and 1961, Vivyan appeared nine times as Lepke, nickname of mobster Louis Buchalter, on NBC's crime drama ''The Lawless Years,'' set during the Roaring 20s. Five of those appearances were on the multi-part episode "Louy K."<ref>{{cite web|url=http://www.imdb.com/title/tt0052484/fullcredits#cast|title=Full cast and crew for ''The Lawless Years|publisher=imdb.com|accessdate=April 3, 2021}}</ref>

Between 1959 and 1961, Vivyan appeared nine times as Lepke, nickname of mobster Louis Buchalter, on NBC's crime drama ''The Lawless Years,'' set during the Roaring 20s. Five of those appearances were on the multi-part episode "Louy K."<ref>{{cite web|url=http://www.imdb.com/title/tt0052484/fullcredits#cast|title=Full cast and crew for ''The Lawless Years''|publisher=Internet Movie Database|accessdate=April 3, 2021}}</ref>

In 1962, Vivyan appeared twice on the syndicated western anthology ''[[Death Valley Days]].'' That same year he appeared as Shelly Hanson in NBC's modern-day western, ''Empire,'' starring Richard Egan as the rancher Jim Redigo, in the episode entitled "Down There, the World."  He appeared on two CBS situation comedies,  [[Lucille Ball]]'s ''The Lucy Show'' in the 1963 episode "Lucy Becomes a Reporter" and in ''Petticoat Junction'' as Lane Haggard in the 1964 episode "Visit from a Big Star."<ref name=imdb/> In 1969, he was teamed up with [[Canada|Canadian]]-born Hollywood actress Yvonne De Carlo in the play, ''Cactus Flower,'' which drew full houses everywhere it played.

In 1962, Vivyan appeared twice on the syndicated western anthology ''[[Death Valley Days]].'' That same year he appeared as Shelly Hanson in NBC's modern-day western, ''Empire,'' starring Richard Egan as the rancher Jim Redigo, in the episode entitled "Down There, the World."  He appeared on two CBS situation comedies,  [[Lucille Ball]]'s ''The Lucy Show'' in the 1963 episode "Lucy Becomes a Reporter" and in ''Petticoat Junction'' as Lane Haggard in the 1964 episode "Visit from a Big Star."<ref name=imdb/> In 1969, he was teamed up with [[Canada|Canadian]]-born Hollywood actress Yvonne De Carlo in the play, ''Cactus Flower,'' which drew full houses everywhere it played.