Ten wildly popular seasons meant that we saw them on again, off again and on again. For four seasons on "Castle," writer Richard Castle and detective Kate Beckett solved murders both grisly and outlandish -- and fell for each other.
They finally made it official with a wedding in 2014.
" probably wouldn't fly these days on a TV sitcom, but audiences loved watching Jackie Gleason and Audrey Meadows spar (every bickering TV couple owes them a debt of gratitude), and they were reassured when so many episodes ended with Ralph telling Alice, "Baby, you're the greatest."The love life of Sookie Stackhouse (Anna Paquin) saw more than its share of twists and turns through the years on "True Blood," but fans seemed to embrace whoever her boyfriend was (such as Alexander Skarsgard, left, as Eric) at any given moment.
Lucille Ball and Desi Arnaz portrayed a show business couple on "I Love Lucy," while behind the scenes they invented the sitcom.
Fans got what they wanted at long last at the end of "House's" season six, but sadly it didn't last.