"Double Wedding" 1/2 Director John Rich. Writers Phil Sharp, Sherwood Schwartz, Jesse Goldstein. Joan and Brad plan to celebrate their 10th Aniversary by duplicating the double ceremony they shared with Natalie (Shirley Mitchell) and Bill (Anthony Ward) Matthews. When they dig out their marriage licenses, they discover that the Justice of the Peace (Joseph Kearns) inadvertently married Natalie to Brad and Joan to Bill! While Brad scrambles for a legal solution, Bill gets aggressively amorous with Joan and Natalie makes a play for Brad. This episode rolls out like a French Farce madcap activity, snappy dialogue, and even a slamming door or two thrown in for good measure. Features Beverly Wills as Joan's sister Beverly.