After 15 episodes, the series finally acknowledges that Craig Carter, a role played by Lucille Ball's own son, Desi Arnaz Jr., has gone away to school. While at the office, Lucy gets a phone call from him, but Desi Arnaz Jr. is not heard or seen. He will, however, return to the role for a single episode in season 5.
Harry pays Dr. Cunningham, his psychiatrist, $35 an hour.
Reading Harry's diary, Lucy says that Harry never had a secret love life and that if they ever made a movie of his life he'd be played by Doris Day. This is a reference to the song "Secret Love" from for the 1953 film "Calamity Jane" starring Doris Day.
Appealing to the IRS Agent (Paul Picerni) for leniency for Harry, Lucy paraphrases "The Merchant of Venice" by William Shakespeare.
Dr. Cunningham, Harry's psychiatrist, first appeared in "Lucy's Vacation". This is his second and last appearance.