Carol Lynley

~ as ~

Janet Willard

Brandon De Wilde

~ as ~

Arthur Bartley

Macdonald Carey

~ as ~

Maj. Malcolm Bartley, Ret.

Marsha Hunt

~ as ~

Jessie Bartley

Warren Berlinger

~ as ~

Ernie

Vaughn Taylor

~ as ~

Professor Willard

Nina Shipman

~ as ~

Lillian Bartley

Buck Class

~ as ~

Axel Sorenson

Roberta Shore

~ as ~

Cherie

William Schallert

~ as ~

George - Bank Vice President (uncredited)