Mason Adams

as Mr. Hoyt

as President

as Justice Joseph Crouch

as Col. Mason

as Roger Philby

as Deputy Director Brown

as The Judge

as Walter Warner Sr.

as Professor Lloyd Rhodes

as Richard Simmons

as Obstetrician

as Bob Ranier

as Clinton Anderson

as Mr. Pike

as Mr. Trapwell (segment "The Scoop")

as Father Nestor

as The Cat in the Hat / Narrator (voice)

as Charlie Hume

as Sidney Pomerantz

as Sumner Murdock

as Doctor

as Grandpa (voice)

as Walter Maxwell (uncredited)

as Wally

as The Banker with Chris

as Dr. Rochelle

as Henry D. Hyde

as Ray Mellette

as Derek's Father

as Frank Halloran

as Bill Wendover

as Mr. Watkins

as Ford

as Ford

as Father Francis Ryan

as Dr. Gordon

as Ron Sandler

as Bill Cairns

as Radio Actor

as Francis

as Dr. Ed Johnson

as Harry Tannenbaum

as President Harris

as Dr. Karl Janss

as Geoffrey Wiggins

as Narrator

as Elmo Tyson

as Dr. Eliot Losen

as Narrator

as Grandpa

as Sidney Pomerantz

as Bob Rutherford

as Narrator (voice)

as Willie the Wino

as Narrator (voice)

as Narrator

as Judge Colbert