After a rash of burglaries in the neighborhood makes the girls feel unsafe, they decide to learn judo for self-protection. The pair don't learn very much.
The entire thing backfires when they teach it to their sons, who boisterously use it on one another and Jerry is given a black eye by Sherman.
Special Notes: This is the last episode featuring Dick Martin as Harry Conners.
Bloopers: When Lucy blows the dog whistles, dogs enter the living room from doors which do not exist.