Answer: Leave it to the Beaver
If you are a reader of a certain age, you can remember a world completely foreign to younger people: a world where television broadcasting standards were so severe that there were pregnant women and couples slept in the same bed, and the bathroom was just not allowed on TV.
Indeed, the first appearance of a toilet on television was considered so scandalous for CBS executives and FCC censors that technically the entire toilet never showed up ̵
For one particular episode of Leave It to Beaver the plot depended solely on the boys ordering a baby alligator from a post office company and then trying to hide it in the house. The only practical place where two boys could hide an alligator without being discovered immediately was a toilet tank. In the scrapping of an entire episode, the CBS executives finally gave the producer of the show, but with a very strict compromise. Not only would the toilet bowl itself not be shown on television, but the actors interacting with it would have to act as if it were just a container into which they put the alligator, and not through dialogue or action on the function of Alli made the device – a joke about "But Beav, what if the alligator is flushed down the toilet?" was completely out of the question in this context. The boys had called the alligator "Captain Jack" and simply called the toilet tank "Captain Jack's Aquarium".
If you think that this must have been the beginning of the end because of unnecessarily restrictive film rules, then you are wrong. For decades after Beaver the strict rules were still valid. In fact, on The Brady Bunch show of a large mixed family sharing a house, the show let the spectators watch the family bath, but strangely, the family bathroom had no toilet at all. The noise of a toilet flush was heard on television only in a series of All in the Family in the 1970s, and it was not until the 1980s with the debut of Married with Children ] that the integration of a bathroom and bathroom has been normalized. Today, however, it is not uncommon for the bathroom and the lavatory to appear even in heavy dramas until the slapstick comedy.
Courtesy of CBS.