A man gives his friend a series of lessons on how to cheat on one's wife without being caught.
Walter Matthau
as Paul Manning
Inger Stevens
as Ruth Manning
Sue Ane Langdon
as Irma Johnson
Jackie Russell
as Jackie Russell
Robert Morse
as Ed Stander
Aline Towne
as Mousey Man's Wife
Claire Kelly
as Harriet Stander
Eve Brent
as Joe X's Blowsy Blonde
Marvin Brody
as Taxi Driver
Majel Barrett
as Mrs. Fred V.
Marian Mason
as Mrs. Rance G.
Tommy Farrell
as Rance G.'s Hanger On
