The original news anchors were veteran journalists Harold Hayes and Robert Hughes, who lasted only one show. They were replaced by former game show and Today host Hugh Downs, who was later joined by co-host Barbara Walters in 1984. Downs and Walters were also previously co-hosts of NBC's Today together. Downs retired in 1999 and Walters became solo news anchor until 2002 when John Miller was hired to be permanent co-host of the series. Miller left and was replaced by John Stossel in 2003. Walters' left the co-anchor position in 2004 and was replaced by Elizabeth Vargas. However, Walters still frequently contributes to the show.
The disctinctive theme music to 20/20 was written by Robert Arnold Israel and based upon ABC's World News Tonight theme written by Lillian Scheinert.
|Host - Contributing|
|Season One||June 6, 1978||—||—|
|Season Thirty-Seven||September 26, 2014||September 4, 2015||51 + 2|
|Season Thirty-Eight||September 11, 2015||August 26, 2016||53 + 2|
|Season Thirty-Nine||September 16, 2016||September 13, 2017||54 + 2|
|Season Forty||September 15, 2017||September 2, 2018||51 + 2|
|Season Forty-One||September 7, 2018||September 20, 2019||44 + 1|
|Season Forty-Two||September 27, 2019||September 31, 2020||31 + 2|
|Season Forty-Three||October 16, 2020||October 1, 2021||36|
|Season Forty-Four||October 8, 2021||September 16, 2022||26|
|Season Forty-Five||September 23, 2022||—||—|
- At a Glance: Additional information about the series
There are no DVD releases for this show.