Ralph

 is the boyfriend of Darrin's cousin, Helen.

Helen brings Ralph to dinner at the Stephenses' home. She wants to show Ralph what a happy married home life is all about so that she can entice him into marriage.

Tabatha wishes Prince Charming out of her Sleeping Beauty storybook, but she cannot get him back into the book. Until she can figure it out, Samantha has to pass him off as her Cousin Charlie. When Helen meets him, she swoons and forgets all about Ralph. Ralph gets angry and leaves.

The next day they see each other. She is upset he left her at the party. He is glad he found out what she was like since he had planned to propose to her. This suddenly changes everything for Helen. She happily latches onto him and they get engaged.