McKenzie's career began in television in a 1961 episode of the
sitcom My Three Sons as Quinn. It would be another 14 years until Richard would make another television guest star appearance on the TV drama ''
Doctors' Hospital'' in 1975 as Dr. Williams. Throughout the 1970s, McKenzie would make guest appearances on many television shows. His most famous guest appearances in the 70's were on the television sitcoms ''
Three's Company in 1978 as Chef Anton, All in the Family/Archie Bunker's Place'' in three episodes between 1978 and 1982 as
Archie Bunker's younger brother Alfred "Fred" Bunker, and on two episodes of
Carter County between 1978 and 1979 as Dr. Fenway. Throughout the 1970s, McKenzie would guest star in such shows as
The Waltons,
Hawaii Five-O,
The Jeffersons,
Roots,
Sword of Justice,
One Day at a Time, etc. McKenzie would also have an extraordinary television career in the 1980s which also included two co-starring role in television shows. His first guest starring role was in the show
Family in three different episodes as two different characters. His first co-starring role was in the 1980s short-lived series
The Yeagers.
The Yeagers was a drama centering on the life of the Yeager family and associates. The series produced only one episode in 1980. The series also co-starred
David Ackroyd,
Guy Boyd, and
Andy Griffith. In 1982, McKenzie would again co-star in another short-lived series entitled
It Takes Two. The series was about a couple, Sam and Molly Quinn who are too focused on their jobs to pay attention to their children or each other. He played Walter Chaiken in the series. The series aired for twenty-two episodes in one season, (1982–1983). The series also co-starred
Richard Crenna,
Patty Duke, and
Helen Hunt. Some other of his memorable guest star roles in the 1980s include those in the shows
Soap,
CBS Afternoon Playhouse, ''
Archie Bunker's Place, Knots Landing, Benson, Growing Pains, Too Close for Comfort, Matlock, ALF'', etc. In the 1990s, McKenzie would guest star on shows such as
The Golden Girls,
The Fresh Prince of Bel-Air,
NYPD Blue,
In the Heat of the Night, etc. His last appearance on television was in a 2002 episode of
Judging Amy as Judge Novak. McKenzie also appeared in many feature films and television films. He starred in more than 10 movies during the course of 22 years. His first movie role as "Behan" in the 1971 movie
Doc. Some of his other memorable appearances in the movies included those in
A.W.O.L. (1972),
Man on a Swing (1974),
Corvette Summer (1978),
Being There (1979),
The Doctor (1991), and
Ghost in the Machine (1993). He also appeared in more than 20 TV movies. His first role was in ''Nicky's World
(1974), as the role of Mr. Lanning, and his last role was in Deadly Medicine'' (1991), as the role of Brookshire. McKenzie made his name in theater as well. His
Broadway credits included
That Championship Season,
Uncle Vanya and many more. McKenzie died on December 1, 2023, at the age of 93. ==Filmography==