This was similar in format to the "Word Dance" segments of "A Thurber Carnival". The show then proceeded through rapid-fire comedy bits, taped segments, and recurring sketches. At the end of every show, Rowan turned to his co-host and said, "Say good night, Dick", to which Martin replied, "Good night, Dick!". The show then featured cast members' opening panels in a psychedelically painted "joke wall" and telling jokes, After which, the show would continue with one final batch of skits, before drawing to a close. After the applause died, executive producer George Schlatter's solitary clapping continued even as the screen turned blank and the production logo, network chimes, and NBC logo appeared. Although episodes included most of the above segments, the arrangement of the segments was often interchanged. The show often featured guest stars. Sometimes, the guest had a prominent spot in the program, at other times the guest would pop in for short "quickies" (one- or two-line jokes) interspersed throughout the show – as was done most famously by Richard Nixon, when running for president. Ruth Buzzi, Judy Carne, Henry Gibson, Larry Hovis, Arte Johnson, Barbara Feldon and Jo Anne Worley appeared in the pilot special from 1967. (Goldie Hawn, who was under contract to "Good Morning World" at the time of the pilot, joined for season 1 in 1968 after that show was canceled). Only the two hosts, announcer Gary Owens, and Buzzi, Carne, Gibson, and Johnson, were in all 14 episodes of season one. Eileen Brennan, Hovis, and Roddy Maude-Roxby left after the first season. The second season had a handful of new people, including Alan Sues, Dave Madden, and Chelsea Brown. All of the new cast members from season two left at the end of that season except Sues, who stayed on until 1972. At the end of the 1968–69 season, Carne chose not to renew her contract, although she did make appearances during 1969–1970. The third season had several new people who only stayed on for that season: Teresa Graves, Jeremy Lloyd, Pamela Rodgers, and Byron Gilliam. Lily Tomlin joined in the middle of the season. Jo Anne Worley, Goldie Hawn, and Judy Carne left after the season. The 1970–71 season brought new additions to the cast include tall, lanky, sad-eyed Dennis Allen, who alternately played quietly zany characters and the straight man for anybody's jokes; comic actress Ann Elder, who also contributed to scripts, tap dancer Barbara Sharma, and Johnny Brown.