List of television series notable for negative reception

A number of television shows, both regular series and one-off specials from around the world, have been judged to be among the worst to have ever been produced. Factors that can reflect poorly on a television series include inherently poor quality, the lack of a budget, rapid cancellation, very low viewership, offensive content, and/or negative impact on other series on the same channel. In some cases, a show that is acceptable on its own merits can be put in a position where it does not belong and be judged "worst ever."

Multiple outlets have produced lists ranking the worst television series and most spectacular television flops in history, including the U.S. publications TV Guide and Entertainment Weekly, the British Mail Online and Jeff Evans's The Penguin TV Companion; in many cases, these lists were partially slanted toward recent memory. TV Guide, for example, published two lists, one in 2002 and another in 2010, each of which had contemporary shows near the top of the list; The Jerry Springer Show and the XFL in the top three of the 2002 list, while The Jay Leno Show topped, and in fact inspired, the 2010 list and the XFL had fallen nearly 20 spots.

The following is a list of television series considered the worst by published professional critics, network executives, and/or through viewer rejection (extreme low viewership despite high promotion). Because situation comedy shows make up a disproportionately large number of shows judged in this manner, they are listed in a separate list of sitcoms considered the worst.

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