The O.C.:
End of all the seasons.
When Anna left
When Marissa died
When Summer gave the necklace with the picture of Marissa in at her wedding
When Ryan told Marissa he loved her on new years eve
When Seth rejected Summer when she had gone to all the trouble on valentines day
Loads more....ect
Sex and the City:
When Samantha got diagnosed with Cancer
When she was cleared with Cancer
End of final season