Once upon a time, many of these sitcoms had huge audiences, recognizable stars, and loyal fans. Then television moved on. Decade after decade, they slowly disappeared from reruns, pop culture, and most people's memories. Some of these shows were genuinely great. The question is: do you remember even five of them?

In the 1960s, Frank Sinatra’s inner circle looked like the center of the universe. The Rat Pack had money, fame, power, and the kind of cool nobody else could touch. And when Sammy Davis Jr. became part of it, the public saw a success story. But along with the tuxedos, jokes, and packed casino crowds came a cost that followed Sammy for the rest of his life.

Everyone knows Frank, Dean, and Sammy. Even Peter Lawford gets a nod thanks to the Kennedy ties. But Joey Bishop? He’s the name most people forget.

Hollywood success stories often focus on glamorous premieres and huge paychecks. What gets overlooked is how many stars had rough starts.

For millions of Americans, George Reeves seemed to have the perfect life. He was television's biggest hero, one of the most recognizable faces in the country, and a man whose future looked brighter than ever. Then, one summer night in 1959, everything changed.

These men starred in hit movies, dominated television, and had enough charm to leave entire generations of women weak in the knees. The funny part? Many Millennial women probably wouldn't recognize half of them. Let's see how many of these former heartthrobs you remember.