ET from September 17, 1965, to April 22, 1966, co-sponsored by Alberto-Culver's VO5 hairdressing products and American Tobacco's Tareyton cigarettes.

It was the first television show to feature the Smothers Brothers as regulars, following a series of night club and guest appearances.

It was the network's last sitcom filmed in black-and-white; shortly after its final telecast, all CBS prime-time series were transmitted in color.

[4] Dick Smothers played himself as a rising young executive at Pandora Publications, working for publisher Leonard J. Costello (Roland Winters).

For instance, neither brother played their instruments on the show (with one exception, at the beginning of "'Twas The Week Before Christmas" episode), and it was not until halfway through the season that they sang the theme song.