Kotch (1971)

Director: Jack Lemmon
Cast: Arlen Stuart, Charles Aidman, Darrell Larson, Deborah Winters, Ellen Geer, Felicia Farr, Jane Connell, Walter Matthau

Synopsis:

Joseph Kotcher, retired salesman, walks out on his son and daughter-in-law after their attempts to put him in a retirement home. He tracks down their babysitter, sacked because she is pregnant, and rents a small house nearby. He finds a new purpose in life.