Actress Lillian Lovely, an Hungarian citizen, is facing deportation for failing to renew her visa. She wants Harrigan Sr. to help her right away, but senior has plans for the St. Patrick's Day parade that afternoon. 

Miss Claridge fouls up the office routine when she falls in love with a con-man and moons about him instead of preparing a brief that the Harrigans need for a case to be tried before the Supreme Court. Father and son then have to solve her romantic problems so that they can meet their Washington deadline.

Junior thinks his case in a small New England court is all sewed up, until he finds out that the judge, the bailiff, and the defendant are all cousins.

Senior Harrigan becomes worried when his partner's son starts dating a nightclub singer.

Gimpy (Charley Cantor), who makes his living by getting hit by cars and collecting damages, sets out to get himself clobbered by a bus driver In the habit of jumping the light. The result is ridiculously amusing, and places the Harrigans on opposing sides in court.

This series' central theme — youth vs. age — gets an amusing workout. When young men grab control of a firm, Harrigan Sr. assigns Harrigan Jr. to reason with them and the result is revolution.

Junior clashes with his father on law procedure. This was the opening show of the series in which Harrigan Jr. tried his first case and learned his first lesson from his pa.