The final Steve Allen Tonight Show was 90 minutes in length. Jonathan Winters has the distinction of appearing on the Allen, Paar, Carson, and Leno versions of the Tonight Show (he also guest hosted during the Paar era).
Jim Henson & The Muppets make one of the earliest network TV appearances. The New York Times listing shows them as "Jim Henson and his puppets," demonstrating that the word "muppet" was not yet part of the vocabulary.
With this show, Kovacs takes over as the permanent host on Mondays and Tuesdays.