Mary Tyler Moore: The 20th Anniversary Show is a 90-minute CBS

CBS

CBS Broadcasting Inc. is a major US commercial broadcasting television network, which started as a radio network. The name is derived from the initials of the network's former name, Columbia Broadcasting System. The network is sometimes referred to as the "Eye Network" in reference to the shape of...

 retrospective

Retrospective

Retrospective generally means to take a look back at events that already have taken place. For example, the term is used in medicine, describing a look back at a patient's medical history or lifestyle.-Music:...

 television special

Television special

A television special is a television program which interrupts or temporarily replaces programming normally scheduled for a given time slot. Sometimes, however, the term is given to a telecast of a theatrical film, such as The Wizard of Oz or The Ten Commandments, which is not part of a regular...

 commemorating the 20th anniversary of the 1970

1970 in television

The year 1970 in television involved some significant events.Below is a list of television-related events in 1970.For the American TV schedule, see: 1970-71 American network television schedule.-Events:...

-1977

1977 in television

The year 1977 in television involved some significant events.Below is a list of television-related events in 1977.For the American TV schedule, see: 1977-78 American network television schedule.-Events:...

 sitcom

Situation comedy

A situation comedy, often shortened to sitcom, is a genre of comedy that features characters sharing the same common environment, such as a home or workplace, accompanied with jokes as part of the dialogue...

 The Mary Tyler Moore Show

The Mary Tyler Moore Show

The Mary Tyler Moore Show is an American television sitcom created by James L. Brooks and Allan Burns that aired on CBS from 1970 to 1977...

which aired on February 18, 1991.

It was hosted by Mary Tyler Moore

Mary Tyler Moore

Mary Tyler Moore is an American actress, primarily known for her roles in television sitcoms. Moore is best known for The Mary Tyler Moore Show , in which she starred as Mary Richards, a 30-something single woman who worked as a local news producer in Minneapolis, and for her earlier role as...

 and featured clips from the show's seven-year run, including a reunion with co-stars Edward Asner, Georgia Engel, Valerie Harper

Valerie Harper

Valerie Harper is an American actress, known for her role as Rhoda Morgenstern on the 1970s television show The Mary Tyler Moore Show, and for her starring roles on the sitcoms Rhoda and Valerie.-Early life and career:Harper was born at the Good Samaritan Hospital in Suffern, Rockland County,...

, Cloris Leachman

Cloris Leachman

Cloris Leachman is an American actress of stage, film and television. She has won eight Primetime Emmy Awards—more than any other performer—and one Daytime Emmy Award...

, Gavin MacLeod

Gavin MacLeod

Gavin MacLeod is an American actor most notable for playing Happy Haines on McHale's Navy, Murray Slaughter on The Mary Tyler Moore Show and Captain Merrill Stubing on The Love Boat...

 and Betty White

Betty White

Betty White Ludden , better known as Betty White, is an American actress, comedienne, singer, author, and former game show personality. With a career spanning seven decades since 1939, she is best known to modern audiences for her television roles as Sue Ann Nivens on The Mary Tyler Moore Show and...

 (Ted Knight

Ted Knight

Ted Knight was an American actor best known for playing the comedic role of Ted Baxter on The Mary Tyler Moore Show, Henry Rush on Too Close for Comfort, and Judge Elihu Smails in Caddyshack.- Early years :...

 died in 1986 but is seen in archive footage) as they all gathered together to reminisce about the series and their characters.

In 2002

2002 in television

The year 2002 in television involved some significant events.Below is a list of television-related events in 2002.For the American TV schedule, see: 2002–03 United States network television schedule.-Events:-Debuts:-1940s:...

, Mary and the cast reunited for another CBS retrospective special, The Mary Tyler Moore Reunion

The Mary Tyler Moore Reunion

The Mary Tyler Moore Reunion is a 60-minute CBS retrospective television special, hosted by Mary Tyler Moore, celebrating her classic 1970-1977 sitcom The Mary Tyler Moore Show which aired on May 13, 2002....

.