4x88 - Dr. John G. Neihardt

April 27, 1971

4x89 - Lauren Bacall, Ralph Richardson, John Gielgud, Richard Attenborough

April 28, 1971

4x90 - Robert Mitchum

April 29, 1971

4x91 - Ralph Richardson, Glenda Jackson, The Bee Gees, John Trevelyan

May 3, 1971

4x92 - Robert Morley, Dame Gladys Cooper

May 4, 1971

4x93 - Lynn Redgrave, Trevor Howard, Christopher Plummer, Patrick Campbell

May 6, 1971

4x94 - Jack Hawkins, Lord George Brown, Constable John Ellis, Kenneth Tynan

May 7, 1971

4x95 - Peter Cook, Dudley Moore, A.J.P. Taylor

May 10, 1971

4x96 - Laurence Harvey, Nicol Williamson, Adrienne Corri, Eddie Chapman

May 11, 1971

4x97 - Richard Harris, Romy Schneider, Dame Sybil Thorndike, Luis Miguel Dominguez

May 12, 1971

4x98 - Jonathan Miller, Spike Milligan, Bernard Levin

May 13, 1971

4x99 - Roger Moore, Jonathan Miller, Enoch Powell

May 14, 1971

4x100 - British Kids

May 17, 1971

4x101 - Groucho Marx, Truman Capote, Jim Fowler

May 25, 1971

4x102 - Wally Cox, Dr. Bruno Bettelheim, Jesse Birnbaum, Phyllis Newman

June 2, 1971

4x103 - George Burns, Cliff Gorman, Sly and the Family Stone, Jim Bouton

June 8, 1971

4x104 - Dr. George Solomon, Robert Mueller, John O Neill, Michael Sharp, Michael Vaquera

June 10, 1971

4x105 - Michael Sharp, Michael Vaquera, Dr. George Solomon, Robert Mueller, John O Neill

June 11, 1971

4x106 - Carol Burnett, Jacques Cousteau, Dr. Carlton Ray

June 28, 1971

4x107 - Kirk Douglas

June 29, 1971

4x108 - John Kerry, John O'Neill

June 30, 1971

4x109 - Jim Fowler, Milos Forman, Jerome Kretchmer, Sharon Poole

July 8, 1971

4x110 - Barry Goldwater

July 9, 1971

4x111 - Hildegarde Knef, James Michener, Joe Raposo

July 12, 1971

4x112 - Daniel Ellsberg

July 13, 1971

4x113 - Shirley Booth, Mayor Carl Stokes, William Ruckelshaus, Al Hibbler

July 14, 1971

4x114 - Benny Goodman, Norman Mailer, Bruce Brown, Dr. Robert Jastrow

July 21, 1971

4x115 - Roger Moore, Chuck McCann, Big Mama Thornton, Saul Alinsky

July 22, 1971

4x116 - William F. Buckley, Henry Morgan, Delaney and Bonnie

July 27, 1971

4x117 - Ingmar Bergman, Bibi Andersson

August 2, 1971

4x118 - Alexis Smith, Bobby Fischer, Neil Chayet

August 5, 1971

4x119 - Charlton Heston, Meadowlark Lemon, Joseph Papp, Jonelle Allen, Alan Weeks, Jeff Goldblum

August 11, 1971

4x120 - Dizzy Gillespie, Evel Knievel, Averell Harriman

August 12, 1971

4x121 - Fran Tarkenton, Mort Sahl, Sen. Fred Harris, Dr. Julius Segal

August 13, 1971

4x122 - Vida Blue, Bob Feller, Milt Kamen, Robert Altman

August 16, 1971

4x123 - Faye Dunaway, Frank Perry, Eloise Laws, Raymond Buckland

August 18, 1971

4x124 - Brian Bedford, Charles Mingus, Harry Reasoner, Arlene Thomas

August 20, 1971

4x125 - Elke Sommer, Karl Wallenda, Seals and Crofts, Dr. Stancil Johnson

August 23, 1971

4x126 - Gloria Steinem, Roberta Flack, Kerry Ellard

August 27, 1971

4x127 - David Steinberg, Dan Hicks and His Hot Licks

September 2, 1971

4x128 - Roger Caras

September 3, 1971

4x129 - Howard Cosell, Frank Gifford, Don Meredith, Paul Hornung, Jerry Kramer, James Wooten

September 6, 1971

4x130 - Ann Miller, Marty Brill, Betty Friedan, William Schutz

September 7, 1971

4x131 - George Burns, Modern Jazz Quartet, Louise Lasser, Dr. Albert Ellis

September 13, 1971

4x132 - Mildred Dunnock, Richard Kiley, David Brower

September 15, 1971

4x133 - F. Lee Bailey, Jacques Cousteau, Helmut Nickel

September 17, 1971

4x134 - John Lennon, Yoko Ono

September 21, 1971

4x135 - Marcel Marceau, Marya Mannes, Fanny, Dr. Sheldon Cherry

September 22, 1971

4x136 - Stan Freberg, Robert Citron, John Lennon, Yoko Ono

September 24, 1971

This episode also features three additional segments from John Lennon & Yoko Ono's appearance on September 11, 1971.

4x137 - William F. Buckley Jr., Hildegard Knef, Johnny Sample

September 29, 1971

4x139 - Rick Barry, L. Brent Bozell, George Israel, Dr. M.T. Mehdi

October 1, 1971

4x140 - Mayor John Lindsay

October 5, 1971

4x141 - Walter Matthau, Norman Mailer, Jose Torres, James Gould

October 7, 1971

4x142 - Dinah Shore, Tuesday Weld, Milton Berle

October 8, 1971

4x143 - Anthony Quinn

October 12, 1971

4x144 - Fred Astaire

October 13, 1971

4x145 - Peter Ustinov

October 14, 1971

4x146 - Charlton Heston

October 15, 1971

4x147 - Jack Lemmon

October 19, 1971

4x148 - Woody Allen

October 20, 1971

4x149 - Keith Gordon, Renee Greene, Michael Ludwig, Teddie Mims, Debbie Epstein, Sylvia Platt

October 21, 1971

4x150 - Tony Randall, Susan B. Anthony, Clement Freud

October 22, 1971

4x151 - Candice Bergen, Peter Boyle, Dr. Han Suyin

October 27, 1971

4x152 - George Bush, Edmund Muskie, Gloria Swanson, Vincent Carey

October 29, 1971

4x153 - Sid Caesar, Robert Shaw, Jack Klugman, Florence Henderson

November 5, 1971

4x154 - Eddie Albert, Cybill Shepherd, The New Seekers, Alejandro Jodorowsky

November 9, 1971

4x155 - Bill Cosby

November 10, 1971

4x156 - Bette Davis

November 17, 1971

4x157 - Lt. Col. Anthony Herbert

November 19, 1971

4x158 - George Harrison, Mick Jones, Gary Wright & Wonderwheel, Ravi Shankar

November 23, 1971

4x159 - Danny Kaye

November 24, 1971

4x160 - The Muppets with Jim Henson, Frank Oz, Jerry Nelson, Caroll Spinney

November 25, 1971

4x161 - Richard Harris, David Frye, David Susskind

November 26, 1971

4x162 - Shirley MacLaine

November 30, 1971

4x163 - Gore Vidal, Norman Mailer, Janet Flanner

December 1, 1971

4x164 - Carol Burnett, Carroll O'Connor, Burt Reynolds

December 7, 1971

4x165 - Glen Campbell, James Coburn, Kathryn Kuhlman, Pat McCormick

December 8, 1971

4x166 - Ryan O'Neal, Sarah Vaughan, Dr. Thomas Noguchi, Hedgemon Lewis

December 9, 1971

4x167 - Julie Andrews, Blake Edwards

December 10, 1971

4x168 - Buddy Hackett, James Garner, Jacques Cousteau

December 14, 1971

4x169 - George Burns, Adelle Davis, The Smothers Brothers

December 15, 1971

4x170 - Groucho Marx, Erin Fleming, Debbie Reynolds, Dan Rowan

December 16, 1971

4x171 - Gov. Ronald Reagan, Bob Newhart, James Wong Howe

December 17, 1971

4x172 - Roman Polanski, Henry Morgan, Mary Lou Williams

December 22, 1971

4x173 - Keith Gordon, Renee Green, Michael Ludwig, Teddie Mims, Debbie Epstein

December 24, 1971

4x174 - Helen Hayes, Truman Capote, John Carradine

December 28, 1971

4x175 - Hal Holbrook, Jerry Lee Lewis, Brendan Gill, Marlene VerPlanck

December 29, 1971

4x176 - E.G. Marshall, Howard K. Smith, Maureen Stapleton, Al Hibbler

December 30, 1971

4x177 - Buck Henry, Pat McCormick, Leonard Frey, Hermione Gingold

December 31, 1971

4x178 - Sandy Duncan, Ralph Nader, Bobby Fischer

January 4, 1972

4x179 - Mort Sahl, Stanley Calkins, Alexis Smith, David Epstein

January 6, 1972

4x180 - Robert Wagner, Adelle Davis, Lola Redford, Ilene Goldman, Mimi Farina, Tom Jans

January 10, 1972

4x181 - Dave Garroway, Jack Anderson, Paul Newman, J. Daniel Mahoney

January 14, 1972

4x182 - Madeline Kahn, Anthony Burgess, Gov. R. Shafer, Dr. Tom Ungerleider

January 19, 1972

4x183 - Don McLean, Robert Shaw, Mary Ure, Yevgeny Yevtushenko

January 20, 1972

4x184 - Frank Capra, Mel Brooks, Robert Altman, Peter Bogdanovich

January 21, 1972

4x185 - Jackie Robinson, George Plimpton, Dr. Daniel Fader

January 26, 1972

4x186 - Paddy Chayefsky, Christopher Isherwood, Allen Ginsberg, Earl "Fatha" Hines

January 27, 1972

4x187 - Valerie Harper, Dr. Edward Teller, Dr. Paul Weiss

February 2, 1972

4x188 - Diahann Carroll, Zero Mostel, Dr. David Hubbard

February 9, 1972