|A piece of every answer, or link, will have some sort of common bond with the other links. Your goal is to identify this missing link that connects the answers together. For example, if the answers were "The Omega Man", "Catherine Zeta Jones", "alpha male", and "Delta Airlines" the missing link would be "letters of the Greek alphabet". As you can see, it is important to give the full answer being looked for. Last names, abbreviations, and partial answers aren't always enough.
Click the link title to see the answer.
: The upper house of the Parliament of the United Kingdom is called this.
: This actress' breakthrough role was in the 2000 film Coyote Ugly. She also appeared in 2006's The Prestige and 2012's Looper.
: This torture device shares its name with a heavy metal band.
: This theory describes hugely impactful events that are almost impossible to see coming, though in hindsight people claim they were predictable.
: What is the missing link?