A show's Theme Tune is the way it gets the attention, and hopefully is good enough to get people Earwormed and singing it to get others watching the show. Once a show has gone into syndication or jumped channels, though, the Theme Tune is one of the first casualties. It will get edited, shortened, or otherwise truncated so as to leave room for more commercials. Occasionally, if the show is on the air on its original channel more than a few years, they'll maim the theme tune for more commercial space while it's still in its original airing. Also, the lyrics of the theme song, where present, may be changed a little.