Dear Mrs. Petrie, Your Husband is in Jail - S3-E28
Character mistake: Rob is telling Laura why he's in jail. He says "Monica Doorwell! She must be Millie and Jerry's babysitter." The babysitter's last name is "Darwell". (00:02:00 - 00:04:00)

Starring: Dick Van Dyke, Mary Tyler Moore, Morey Amsterdam, Larry Mathews, Rose Marie
Dear Mrs. Petrie, Your Husband is in Jail - S3-E28
Character mistake: Rob is telling Laura why he's in jail. He says "Monica Doorwell! She must be Millie and Jerry's babysitter." The babysitter's last name is "Darwell". (00:02:00 - 00:04:00)
Sally and the Lab Technician - S1-E3
Continuity mistake: When Jamie Farr the "Snappy Service" guy comes in and gives everyone their coffee Buddy throws a straw into the straw cup, but it falls down on the floor then vanishes, never to be seen again.
Rob Petrie: I want to take a nap before I go to sleep.
Harrison B. Harding of Camp Crowder, Mo. - S1-E6
Trivia: Rob tells the police over the phone "Get a prowl car to 148 Bonny Medow Road." 148 was also Dick Van Dyke's weight during the TV series.