Continuity mistake: Shirley tosses a loose measuring tape to Laurie, yet when Laurie catches it, it's tightly coiled. (00:06:00)
Princess and the Partridge - S3-E3
Continuity mistake: Keep an eye on the woman seated behind the Princess at the concert. In some shots she is wearing a necklace and seated beside a younger man; in others, she has no necklace and is seated beside an older man. (00:21:55)
This Male Chauvinist Piggy Went to Market - S3-E1
Revealing mistake: When Laurie goes to flip Goose over her shoulder, it's obvious that a stuntman is actually flipped; he has much shorter hair than the actor portraying Goose. (00:11:45)