'Cagney & Lacey'
At the time, it probably seemed like a weird concept for a series: a feminism-inflected drama about two female detectives solving crime in gritty, 1980s New York City. But Cagney & Lacey proved popular enough to be resurrected a whopping two times. The characters first appeared in a well-received 1981 TV movie, which led to the production of a serialized spin-off. That first season did poorly, however, and was canceled in 1982. It was then renewed in 1983, but canceled again after one season. At that point, fans — many of whom were older women — reacted, sending thousands of letters to CBS and demanding its return. The network listened, adding Cagney and Lacey back to its lineup in 1984; it went on to rack up plenty of Emmy and Golden Globe awards, before it was finally canceled for good in 1988.