In a film series, the love interest to the hero is often killed off or otherwise exorcised from the Hero's life, either by the end of the first film, or at the beginning of a sequel.
This cliche can both provide a strong emotional incentive for the hero, and can divorce the hero from any attachments, leaving them free to go out and kick ass with abandon. Because plots are driven by conflict, it is not common to see a happily united couple stay together for any extended period of time. Even if they've hooked up at the end of the movie, the thrill of the chase is over and the easiest way for writers to shake things up for a sequel is to dispose of one of the unfortunate lovers. Especially prevalent in action movies, where having a love interest would slow down the action.
Can also occur in TV shows, where the main characters constantly have new romances from episode to episode.
|2012||Wrath of the Titans|
|2012||Ghost Rider: Spirit of Vengeance|
|2011||Sherlock Holmes: A Game of Shadows|
|2011||Mission: Impossible: Ghost Protocol|
|2011||Captain America: The First Avenger|
|2008||The Dark Knight|
|2007||Pirates of the Caribbean: At World's End|
|2006||Pirates of the Caribbean: Dead Man's Chest|
|2004||The Bourne Supremacy|
|2002||Die Another Day|
|2002||Men in Black II|
|1997||Tomorrow Never Dies|
|1993||Army of Darkness|
|1989||Lethal Weapon 2|
|1987||Evil Dead 2: Dead by Dawn|
|Code Geass: Lelouch of the Rebellion|
|How I Met Your Mother|
|Doctor Who (Reboot)|
|Mobile Suit Gundam SEED Destiny|
|Mobile Suit Gundam SEED|
|Star Trek: Deep Space Nine|