Cold open - Wikipedia, the free encyclopedia:
A cold open (also referred to as a teaser) in a television program or movie is the technique of jumping directly into a story at the beginning or opening of the show, before the title sequence or opening credits are shown. Shows which air some form of titles before jumping into the story and then running a formal opening sequence are also considered cold opens.
Cinematically, the cold open can last anywhere from less than a minute up to ten minutes. In rare circumstances it can be even longer: for instance, in The Departed, the title is not displayed until 18 minutes into the film). Perhaps the best known example is the pre-title "teaser" which occurs in all James Bond films since From Russia with Love.