The split screen is a technique used to depict multiple scenes occurring simultaneously. It is often employed to show both sides of a phone conversation. In 24, the split screen technique receives thorough use due to the show's real time format and simultaneous multiple plot lines. A split screen showcasing multiple characters and locations is always featured along with the ticking clock on each return from a commercial break (the act-in clock). Additionally, the final few minutes of almost every episode are prefaced by a split screen, often with urgent music, to update viewers on the status of each major character and plotline as the hour ends.