Eight Is Enough - Season 4 Episode 3 I Do, I Do, I Do, I Do
Overview: David and Janet set a wedding date but it turns out to be the same day Merle and Susan decided to move up the wedding day to accomodate Merle's ballplaying career move. Nancy gets a job delivering singing telegrams and is hired to deliver one at the double wedding for David and Janet and Merle and Susan.