TV is becoming a medium that rivals cinema. Each year we see more and more tv series and most of them are almost perfect. So let’s find out some things about TV series that left their mark. 45 on TV Guide’s 100 Greatest Episodes of All Time Its series finale was watched by an estimated 93 million viewers, almost 40% of the US population at the time In 2002, Cheers was ranked No. 18 on TV Guide’s 50 Greatest TV Shows of All Time In 2013, the Writers Guild of America ranked it as the eighth-best-written TV series TV Guide ranked it No.