Heil Honey I'm Home! (partially found British sitcom; 1990)
In 1990, what is often cited as one of the worst television shows ever conceived aired. Titled Heil Honey I'm Home!, it was a sitcom featuring Adolf Hitler and Eva Braun in a nice quiet neighborhood. The catch here is that the Hitlers live next to a pair of obnoxious Jewish neighbors called the Goldensteins.
The sitcom enraged audiences, not just for its offensive nature, but for how terrible it was at being the very thing it
was trying to parody, cookie cutter TV sitcoms. It is often regarded as one of the shows everyone can agree to be inherently awful.
The show aired once in 1990, was quickly cancelled due to exceptionally negative response and was (understandably) never shown again. The one episode can be found easily on bootlegs and on YouTube. What can't be found at all are the remaining 12 episodes (and according to the official website of Gareth Marks, actually 16 episodes) they reportedly recorded (with some even having been completely finished). Many people argue whether or not this is a good thing. Some people are happy with this terrible show staying hidden forever, whereas others have a very morbid curiosity towards it. Either way, the remaining episodes, to this day, have never been seen, having assumingly been sealed away in some unknown location.