The same evening this episode originally aired, Roy Roberts also appeared on "Gunsmoke," "Here's Lucy's" lead-in on CBS. Roberts played Mr. Bodkin in 19 episodes of the Western series. These two shows are Roberts' last television appearances before his death a year later.
The title without the abbreviations is "Lucy is No Good as a Registered Nurse".
Lucy Carter's daughter, Kim, has named her cat after her uncle Harry, just the same way Lucy Ricardo's son, Ricky, named his dog after his 'uncle' Fred.