Dick Van Dyke as Rev. Clayton Brooks

Pippa Scott as Natalie Brooks

Tom Poston as Mr. Stopworth

Edward Everett Horton as Hiram C. Grayson

Bob Elliott as Hugh Upson / David Chetley / Sandy Van Andy

Vincent Gardenia as Mayor Wappler

Barnard Hughes as Dr. Proctor

Graham Jarvis as Amos Bush

Jean Stapleton as Mrs. Wappler

Paul Benedict as Zen Buddhist

Judith Lowry as Odie Turman

Bob Newhart as Merwin Wren

Hubert H. Humphrey as Self (archive footage)

Pat Nixon as Self (archive footage)

Richard Nixon as Self (archive footage)

Ronald Reagan as Self (archive footage)

Spiro Agnew as Self (archive footage)

Barbara Cason as Letitia Hornsby

Sudie Bond as Cissy

Helen Page Camp as Mrs. Watson

Simon Scott as Mr. Kandiss

Raymond Kark as Homer Watson

Peggy Rea as Mrs. Proctor

Woodrow Parfrey as Tobacco Executive

George Mann as Bishop Manley

Charles Pinney as Col. Galloway

M. Emmet Walsh as Art

Gloria LeRoy as The Hooker

Eric Boles as Dennis

Jack Grimes as TV Stage Manager

Walter Sande as Tobacco Executive

Harvey Jason as Hypnotist

Robert Christopher as Television Director (uncredited)

Murray Cline as Milkman (uncredited)

Michael Cornelison as Protester (uncredited)

Stan Gottlieb as Man on Operating Table (uncredited)

Ray Goulding as Walter Chronic / Paul Hardly / Arthur Lordly (uncredited)

Lynn Guthrie as Townsman (uncredited)

Hubert H. Humphrey as Self (archive footage) (uncredited)

Ted Knight as Mr. Slick (uncredited)

Norman Lear as Crying Man (uncredited)

Maureen McCormick as Talking Doll (voice) (uncredited)

Burt Prelutsky as Tourist Asking for Directions (uncredited)

Mrs. Burt Prelutsky as Tourist's Wife (uncredited)

Charles White as Senator Sildge (uncredited)

Jerry Whittington as Wilber Scott (uncredited)

Glenn Yarbrough as Working Stiff (uncredited)

Louis Zorich as Douglas Truesdale (uncredited)