Actor Billy Crystal; actor Charles Nelson Reilly; actor Merie Earle; actor Earl Holliman.

John Denver - They discuss his movie ""Oh, God!,"" George Burns playing God, renting a house in L.A. for filming and setting off the burglar alarm, displays his juggling ability and sings ""Baby, You Look Good to Me Tonight,"" and ""Alaska."" The Carpenters - They discuss their vacation in Hawaii, going to Europe, Karen explains Richard's contribution to their success, sings ""From This Moment On,"" and told of swallowing a moth in the midst of singing. Tommy Smothers - They discuss the parting of the Smothers Brothers, selling Smothers Brothers material.

Actor Buddy Hackett; actor Cindy Williams; Journalist Sander Vanocur talks about the state of television and Johnny makes an interesting observation about the right time to end a television show being when you are "still on top".

With Actor Richard Harris; actress Ann Turkel; actor Buck Henry; David Horowitz.

La jugadora de tenis Martina Navratilova; el actor McLean Stevenson; el cómico George Carlin; Rita Reutter.

With Comedian David Steinberg, Violinist Itzhak Perlman, Zoologist Joan Embery

With Actress Mitzi Gaynor, Actor Orson Bean, and Astronomer Dr. Carl Sagan

Bruce Dern; Fernando Lamas; Mike Preminger; Dr. Samuel Dunkell.

With Comic Richard Pryor; actor Chevy Chase; actress Marilyn Sokol; actor James Hampton.

With Actor Orson Bean; author David Horowitz; oil well firefighter Red Adair.

With Actor Peter Falk; actor Steve Landesberg; astronomer Carl Sagan; boxer Muhammad Ali.

Actress Suzanne Pleshette; Dr. Paul Ehrlich; host Tom Snyder.

Alice Cooper, Jay Leno, Aunt Blabby

With actor Tony Randall; drummer Buddy Rich; comedian Tom Dreesen; actress Merie Earle.

Richard Benjamin talked about of doing "Quark" for NBC.

Actor Gregory Peck; actor Edgar Bergen; actor George Gobel; actor Jim Bouton.

With Comic Don Rickles; actor Eli Wallach; author Colleen McCullough; Lou Brock

Sid Caesar, Eubie Blake, Stump the Band

With Jane Fonda, Orson Bean, Skip Stephenson, Dr. Michael Fox Desk- Johnny showed stills of personalities and ventured what they'd say if told the world will end in one hour.