Inger Stevens Katrin "Katy" Holstrum Actor William Windom Congressman Glen Morley Actor Cathleen Nesbitt Agatha Morley Actor Mickey Sholdar Steven Morley Actor Rory O'Brien Danny Morley Actor Philip Coolidge Cooper the butler Actor Walter Sande Lars "Papa" Holstrum Actor Charles Herbert Arnold Guest Star Reta Shaw Elsa Guest Star Paul Hartman Caulfield Guest Star John Astin Joe Hastings Guest Star Gregory Morton Congressman Lazzari Guest Star Alice Frost Mama Guest Star Florence Ravenel Millie Guest Star David Lewis Senator Charles Ames Guest Star Bob Jellison Collins Guest Star Robert Lowery Bailey Guest Star William Smith Clancy Guest Star Patty McCormack Helga Guest Star Barbara Perry Connie Guest Star Harry Ackerman Executive Producer Bob Claver Producer Peter Kortner Producer Paul Nickell Director Don Taylor Director William D. Russell Director Gene Reynolds Director Mel Ferrer Director Ralph Nelson Director Gene Nelson Director Jerry Paris Director Steve Gethers Writer Jerry Davis Writer Lee Loeb Writer Michael Adams Writer Peggy Chantler Writer John McGreevey Writer William Cowley Writer Charles Woolf Writer Walter Black Writer