What is the title of the first episode of Grey's Anatomy?

The first episode of Grey's Anatomy is titled "A Hard Day's Night." It aired on March 27, 2005, as the show's pilot and series premiere on ABC.

Written by creator Shonda Rhimes and directed by Peter Horton, the episode follows Meredith Grey and the other new interns through their first 48-hour shift at Seattle Grace Hospital. Meredith also discovers that Derek Shepherd, the man she met the night before, is a surgeon at the hospital.

The title comes from the Beatles song "A Hard Day's Night," continuing a naming tradition used throughout the series: Grey's Anatomy episodes are generally named after songs. The episode also establishes Richard Webber as Chief of Surgery and Miranda Bailey as the interns' intimidating resident supervisor.

Viewers sometimes confuse the title with later high-profile episodes such as "It's the End of the World" or "Death and All His Friends." Those episodes belong to later seasons and are associated with major crises, while "A Hard Day's Night" is specifically the opening chapter.