Most "I Love Lucy" episodes center around crazy plans thought up by Lucy, but in this one she is actually the sane person in the room. Ricky has forgotten his wedding date and needs to go to extraordinary lengths to be reminded of it before Lucy finds out. The success of the first act depends entirely on the talent of Desi Arnaz. Lo and behold, he does it beautifully, showing great comedy timing and an ability to do physical humour.
In the second act he has to make up for his mistake and the story falls relatively flat then. Another conflict that is solved by a song?