Lost
One word, drifting slowly out of the dark towards the camera, over a low tone that is barely a piece of music. Fifteen seconds, no cast, no footage — the cheapest main title of any network drama of its size, and the most imitated.
Seasons 1–6
15sUnchanged for six years, and the whole of it: the word arrives, turns slightly, and the episode starts. Every name the show had went to the end credits instead.