[1] Henderson, the youngest of 10 children,[2] was born on February 14, 1934,[3] in Dale, Indiana, a small town in the southwestern part of the state.

[citation needed] In 1959, she sang "Don't Let a Be-Back Get Away",[21] in Good News About Olds, an industrial musical for Oldsmobile.

[22] Bill Hayes and she also gave a musical performance on the January 13, 1960, broadcast of Tonight Starring Jack Paar.

[26] She also joined the ranks of what was then called The Today Girl on NBC's long-running morning show, doing weather and light news, a position also once held by Barbara Walters.

[27] She gave later musical performances on Paar's subsequent talk show in 1963, including the January 25[28] and February 22[29] broadcasts.

[32] An avid game-show fan, Henderson was a frequent panelist on the original version of Hollywood Squares[33] and made occasional appearances on The $25,000 Pyramid.

She also appeared alongside her Brady Bunch co-star Robert Reed on the John Davidson-hosted version of Hollywood Squares and teamed with Reed, Maureen McCormick, Christopher Knight and Susan Olsen on one of the original Family Feud's All-Star weeks, where they finished in second place.

[2][34] During that time, she hosted a cooking show on TNN, Country Kitchen,[34] and did ads for Prange's, a Wisconsin department store chain.

She appeared on "The Love Boat" S1 E11 "Divorce Me, Please" vignette as Audrey Baynes, who finds new appreciation for her husband, played by Shecky Greene (1977).

Henderson co-hosted the short-lived NBC morning talk show Later Today (1999–2000), with Jodi Applegate and Asha Blake.

[2] In 2003, Henderson seemed to poke fun at her wholesome image by appearing in a Pepsi Twist television commercial with Ozzy Osbourne.

[36] Henderson also appeared with her TV children, as she did with Christopher Knight on the reality television series My Fair Brady.

In 2002, she made a memorable guest appearance on improvisational comedy show Whose Line Is It Anyway?, participating in on-screen kisses with Ryan Stiles and Colin Mochrie.

She won money for the sisters on the game show Weakest Link and on a classic television-themed episode of Who Wants to Be a Millionaire in 2001, winning $32,000 in their name.

In 1987, she married her second husband, hypnotherapist Dr. John George Kappas, whom she had met when he treated her for depression and stage fright in the early 1980s.

[1][54] Three days before her death, Henderson had attended the recording of Dancing with the Stars to support her friend and former on-screen daughter Maureen McCormick, who was a contestant.