September 2004 is when Flight 815 crashed on an island in the first episode of the TV series “Lost.” Three years later, after many characters have died (and some have come back to life) the series is in its final season.

The show was originally meant to run two seasons, but additional episodes extended it to three seasons.

The producers of “Lost” have been planning this ending for three years now. “Lost” was mostly filmed in Hawaii.

When the series first aired, some critics thought “Lost” was going to be a mixture of “Lord of the Flies,” “Survivor” and “Gilligan’s Island.” Writers and producers proved them wrong; they had something else up their sleeves. The producers threw in physics and time-shifting concepts to throw everyone off.

“Lost” is one of those shows that may be difficult for viewers to follow. However, the producers repeat episodes and provide subtitles in the new shows to bring viewers up to speed.

Does the show title have multiple meanings? Obviously the characters are lost on an island. It may be intentional on the part of the writers that the audience is left in the dark and suspense is continued.

“Lost,” which has won Emmy Awards and Golden Globes, airs on ABC at 9 p.m. Tuesdays.