Despite American Idols enormous success Wednesday night, loyal fans of ABC's Lost still turned out in big numbers, as the season finale of the ABC hit drew 17.57 million viewers and an overall 11.4 rating and a 17 share. Nevertheless, the figure was down from last year's Lost finale, which scored a 13.6/20. Meanwhile, the summer season officially begins tonight (Thursday), with CBS and NBC airing a full slate of repeats, while ABC runs the movie Charlie's Angels: Full Throttle, followed by Primetime Live and Fox presents the season premiere of So You Think You Can Dance.